Actual source code: petscsnes.h

petsc-master 2019-05-18
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  1: /*
  2:     User interface for the nonlinear solvers package.
  3: */
  6:  #include <petscksp.h>
  7:  #include <petscdmtypes.h>
  8:  #include <petscfvtypes.h>
  9:  #include <petscdmdatypes.h>

 11: /*S
 12:      SNES - Abstract PETSc object that manages all nonlinear solves

 14:    Level: beginner

 16:   Concepts: nonlinear solvers

 18: .seealso:  SNESCreate(), SNESSetType(), SNESType, TS, KSP, KSP, PC, SNESDestroy()
 19: S*/
 20: typedef struct _p_SNES* SNES;

 22: /*J
 23:     SNESType - String with the name of a PETSc SNES method.

 25:    Level: beginner

 27: .seealso: SNESSetType(), SNES, SNESCreate(), SNESDestroy(), SNESSetFromOptions()
 28: J*/
 29: typedef const char* SNESType;
 30: #define SNESNEWTONLS         "newtonls"
 31: #define SNESNEWTONTR         "newtontr"
 32: #define SNESPYTHON           "python"
 33: #define SNESNRICHARDSON      "nrichardson"
 34: #define SNESKSPONLY          "ksponly"
 35: #define SNESKSPTRANSPOSEONLY "ksptransposeonly"
 36: #define SNESVINEWTONRSLS     "vinewtonrsls"
 37: #define SNESVINEWTONSSLS     "vinewtonssls"
 38: #define SNESNGMRES           "ngmres"
 39: #define SNESQN               "qn"
 40: #define SNESSHELL            "shell"
 41: #define SNESNGS              "ngs"
 42: #define SNESNCG              "ncg"
 43: #define SNESFAS              "fas"
 44: #define SNESMS               "ms"
 45: #define SNESNASM             "nasm"
 46: #define SNESANDERSON         "anderson"
 47: #define SNESASPIN            "aspin"
 48: #define SNESCOMPOSITE        "composite"
 49: #define SNESPATCH            "patch"

 51: /* Logging support */
 52: PETSC_EXTERN PetscClassId SNES_CLASSID;
 53: PETSC_EXTERN PetscClassId DMSNES_CLASSID;

 55: PETSC_EXTERN PetscErrorCode SNESInitializePackage(void);

 57: PETSC_EXTERN PetscErrorCode SNESCreate(MPI_Comm,SNES*);
 58: PETSC_EXTERN PetscErrorCode SNESReset(SNES);
 59: PETSC_EXTERN PetscErrorCode SNESDestroy(SNES*);
 60: PETSC_EXTERN PetscErrorCode SNESSetType(SNES,SNESType);
 61: PETSC_EXTERN PetscErrorCode SNESMonitor(SNES,PetscInt,PetscReal);
 62: PETSC_EXTERN PetscErrorCode SNESMonitorSet(SNES,PetscErrorCode(*)(SNES,PetscInt,PetscReal,void*),void *,PetscErrorCode (*)(void**));
 63: PETSC_EXTERN PetscErrorCode SNESMonitorSetFromOptions(SNES,const char[],const char[],const char [],PetscErrorCode (*)(SNES,PetscInt,PetscReal,PetscViewerAndFormat*),PetscErrorCode (*)(SNES,PetscViewerAndFormat*));
 64: PETSC_EXTERN PetscErrorCode SNESMonitorCancel(SNES);
 65: PETSC_EXTERN PetscErrorCode SNESMonitorSAWs(SNES,PetscInt,PetscReal,void*);
 66: PETSC_EXTERN PetscErrorCode SNESMonitorSAWsCreate(SNES,void**);
 67: PETSC_EXTERN PetscErrorCode SNESMonitorSAWsDestroy(void**);
 68: PETSC_EXTERN PetscErrorCode SNESSetConvergenceHistory(SNES,PetscReal[],PetscInt[],PetscInt,PetscBool );
 69: PETSC_EXTERN PetscErrorCode SNESGetConvergenceHistory(SNES,PetscReal*[],PetscInt *[],PetscInt *);
 70: PETSC_EXTERN PetscErrorCode SNESSetUp(SNES);
 71: PETSC_EXTERN PetscErrorCode SNESSolve(SNES,Vec,Vec);
 72: PETSC_EXTERN PetscErrorCode SNESSetErrorIfNotConverged(SNES,PetscBool );
 73: PETSC_EXTERN PetscErrorCode SNESGetErrorIfNotConverged(SNES,PetscBool  *);

 75: PETSC_EXTERN PetscErrorCode SNESSetWorkVecs(SNES,PetscInt);

 77: PETSC_EXTERN PetscErrorCode SNESAddOptionsChecker(PetscErrorCode (*)(SNES));

 79: PETSC_EXTERN PetscErrorCode SNESSetUpdate(SNES, PetscErrorCode (*)(SNES, PetscInt));


 82: PETSC_EXTERN PetscErrorCode SNESRegister(const char[],PetscErrorCode (*)(SNES));

 84: PETSC_EXTERN PetscErrorCode SNESGetKSP(SNES,KSP*);
 85: PETSC_EXTERN PetscErrorCode SNESSetKSP(SNES,KSP);
 86: PETSC_EXTERN PetscErrorCode SNESSetSolution(SNES,Vec);
 87: PETSC_EXTERN PetscErrorCode SNESGetSolution(SNES,Vec*);
 88: PETSC_EXTERN PetscErrorCode SNESGetSolutionUpdate(SNES,Vec*);
 89: PETSC_EXTERN PetscErrorCode SNESGetRhs(SNES,Vec*);
 90: PETSC_EXTERN PetscErrorCode SNESView(SNES,PetscViewer);
 91: PETSC_EXTERN PetscErrorCode SNESLoad(SNES,PetscViewer);
 92: PETSC_STATIC_INLINE PetscErrorCode SNESViewFromOptions(SNES A,PetscObject obj,const char name[]) {return PetscObjectViewFromOptions((PetscObject)A,obj,name);}
 93: PETSC_EXTERN PetscErrorCode SNESReasonView(SNES,PetscViewer);
 94: PETSC_EXTERN PetscErrorCode SNESReasonViewFromOptions(SNES);

 96: #define SNES_FILE_CLASSID 1211224

 98: PETSC_EXTERN PetscErrorCode SNESSetOptionsPrefix(SNES,const char[]);
 99: PETSC_EXTERN PetscErrorCode SNESAppendOptionsPrefix(SNES,const char[]);
100: PETSC_EXTERN PetscErrorCode SNESGetOptionsPrefix(SNES,const char*[]);
101: PETSC_EXTERN PetscErrorCode SNESSetFromOptions(SNES);
102: PETSC_EXTERN PetscErrorCode SNESResetFromOptions(SNES);

104: PETSC_EXTERN PetscErrorCode SNESSetUseMatrixFree(SNES,PetscBool,PetscBool);
105: PETSC_EXTERN PetscErrorCode SNESGetUseMatrixFree(SNES,PetscBool*,PetscBool*);
106: PETSC_EXTERN PetscErrorCode MatCreateSNESMF(SNES,Mat*);
107: PETSC_EXTERN PetscErrorCode MatSNESMFGetSNES(Mat,SNES*);
108: PETSC_EXTERN PetscErrorCode MatSNESMFSetReuseBase(Mat,PetscBool);
109: PETSC_EXTERN PetscErrorCode MatSNESMFGetReuseBase(Mat,PetscBool*);
110: PETSC_EXTERN PetscErrorCode MatMFFDComputeJacobian(SNES,Vec,Mat,Mat,void*);

112: PETSC_EXTERN PetscErrorCode MatDAADSetSNES(Mat,SNES);

114: PETSC_EXTERN PetscErrorCode SNESGetType(SNES,SNESType*);
115: PETSC_EXTERN PetscErrorCode SNESMonitorDefault(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
116: PETSC_EXTERN PetscErrorCode SNESMonitorScaling(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
117: PETSC_EXTERN PetscErrorCode SNESMonitorRange(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
118: PETSC_EXTERN PetscErrorCode SNESMonitorRatio(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
119: PETSC_EXTERN PetscErrorCode SNESMonitorRatioSetUp(SNES,PetscViewerAndFormat*);
120: PETSC_EXTERN PetscErrorCode SNESMonitorSolution(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
121: PETSC_EXTERN PetscErrorCode SNESMonitorResidual(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
122: PETSC_EXTERN PetscErrorCode SNESMonitorSolutionUpdate(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
123: PETSC_EXTERN PetscErrorCode SNESMonitorDefaultShort(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
124: PETSC_EXTERN PetscErrorCode SNESMonitorDefaultField(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
125: PETSC_EXTERN PetscErrorCode SNESMonitorJacUpdateSpectrum(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
126: PETSC_EXTERN PetscErrorCode SNESMonitorFields(SNES,PetscInt,PetscReal,PetscViewerAndFormat *);
127: PETSC_EXTERN PetscErrorCode KSPMonitorSNES(KSP,PetscInt,PetscReal,void*);
128: PETSC_EXTERN PetscErrorCode KSPMonitorSNESLGResidualNormCreate(MPI_Comm,const char[],const char[],int,int,int,int,PetscObject**);
129: PETSC_EXTERN PetscErrorCode KSPMonitorSNESLGResidualNorm(KSP,PetscInt,PetscReal,PetscObject*);
130: PETSC_EXTERN PetscErrorCode KSPMonitorSNESLGResidualNormDestroy(PetscObject**);

132: PETSC_EXTERN PetscErrorCode SNESSetTolerances(SNES,PetscReal,PetscReal,PetscReal,PetscInt,PetscInt);
133: PETSC_EXTERN PetscErrorCode SNESSetDivergenceTolerance(SNES,PetscReal);
134: PETSC_EXTERN PetscErrorCode SNESGetTolerances(SNES,PetscReal*,PetscReal*,PetscReal*,PetscInt*,PetscInt*);
135: PETSC_EXTERN PetscErrorCode SNESGetDivergenceTolerance(SNES,PetscReal*);
136: PETSC_EXTERN PetscErrorCode SNESSetTrustRegionTolerance(SNES,PetscReal);
137: PETSC_EXTERN PetscErrorCode SNESGetForceIteration(SNES,PetscBool*);
138: PETSC_EXTERN PetscErrorCode SNESSetForceIteration(SNES,PetscBool);
139: PETSC_EXTERN PetscErrorCode SNESGetIterationNumber(SNES,PetscInt*);
140: PETSC_EXTERN PetscErrorCode SNESSetIterationNumber(SNES,PetscInt);

142: PETSC_EXTERN PetscErrorCode SNESGetNonlinearStepFailures(SNES,PetscInt*);
143: PETSC_EXTERN PetscErrorCode SNESSetMaxNonlinearStepFailures(SNES,PetscInt);
144: PETSC_EXTERN PetscErrorCode SNESGetMaxNonlinearStepFailures(SNES,PetscInt*);
145: PETSC_EXTERN PetscErrorCode SNESGetNumberFunctionEvals(SNES,PetscInt*);

147: PETSC_EXTERN PetscErrorCode SNESSetLagPreconditioner(SNES,PetscInt);
148: PETSC_EXTERN PetscErrorCode SNESGetLagPreconditioner(SNES,PetscInt*);
149: PETSC_EXTERN PetscErrorCode SNESSetLagJacobian(SNES,PetscInt);
150: PETSC_EXTERN PetscErrorCode SNESGetLagJacobian(SNES,PetscInt*);
151: PETSC_EXTERN PetscErrorCode SNESSetLagPreconditionerPersists(SNES,PetscBool);
152: PETSC_EXTERN PetscErrorCode SNESSetLagJacobianPersists(SNES,PetscBool);
153: PETSC_EXTERN PetscErrorCode SNESSetGridSequence(SNES,PetscInt);
154: PETSC_EXTERN PetscErrorCode SNESGetGridSequence(SNES,PetscInt*);

156: PETSC_EXTERN PetscErrorCode SNESGetLinearSolveIterations(SNES,PetscInt*);
157: PETSC_EXTERN PetscErrorCode SNESGetLinearSolveFailures(SNES,PetscInt*);
158: PETSC_EXTERN PetscErrorCode SNESSetMaxLinearSolveFailures(SNES,PetscInt);
159: PETSC_EXTERN PetscErrorCode SNESGetMaxLinearSolveFailures(SNES,PetscInt*);
160: PETSC_EXTERN PetscErrorCode SNESSetCountersReset(SNES,PetscBool);

162: PETSC_EXTERN PetscErrorCode SNESKSPSetUseEW(SNES,PetscBool );
163: PETSC_EXTERN PetscErrorCode SNESKSPGetUseEW(SNES,PetscBool *);
164: PETSC_EXTERN PetscErrorCode SNESKSPSetParametersEW(SNES,PetscInt,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal);
165: PETSC_EXTERN PetscErrorCode SNESKSPGetParametersEW(SNES,PetscInt*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*);

167:  #include <petscdrawtypes.h>
168: PETSC_EXTERN PetscErrorCode SNESMonitorLGCreate(MPI_Comm,const char[],const char[],int,int,int,int,PetscDrawLG*);
169: PETSC_EXTERN PetscErrorCode SNESMonitorLGResidualNorm(SNES,PetscInt,PetscReal,void*);
170: PETSC_EXTERN PetscErrorCode SNESMonitorLGRange(SNES,PetscInt,PetscReal,void*);

172: PETSC_EXTERN PetscErrorCode SNESSetApplicationContext(SNES,void *);
173: PETSC_EXTERN PetscErrorCode SNESGetApplicationContext(SNES,void *);
174: PETSC_EXTERN PetscErrorCode SNESSetComputeApplicationContext(SNES,PetscErrorCode (*)(SNES,void**),PetscErrorCode (*)(void**));

176: PETSC_EXTERN PetscErrorCode SNESPythonSetType(SNES,const char[]);

178: PETSC_EXTERN PetscErrorCode SNESSetFunctionDomainError(SNES);
179: PETSC_EXTERN PetscErrorCode SNESGetFunctionDomainError(SNES, PetscBool *);
180: PETSC_EXTERN PetscErrorCode SNESGetJacobianDomainError(SNES,PetscBool*);
181: PETSC_EXTERN PetscErrorCode SNESSetJacobianDomainError(SNES);
182: PETSC_EXTERN PetscErrorCode SNESSetCheckJacobianDomainError(SNES,PetscBool);
183: PETSC_EXTERN PetscErrorCode SNESGetCheckJacobianDomainError(SNES,PetscBool*);

185: /*E
186:     SNESConvergedReason - reason a SNES method was said to
187:          have converged or diverged

189:    Level: beginner

191:    The two most common reasons for divergence are
192: $   1) an incorrectly coded or computed Jacobian or
193: $   2) failure or lack of convergence in the linear system (in this case we recommend
194: $      testing with -pc_type lu to eliminate the linear solver as the cause of the problem).

196:    Diverged Reasons:
197: .    SNES_DIVERGED_LOCAL_MIN - this can only occur when using the line-search variant of SNES.
198:        The line search wants to minimize Q(alpha) = 1/2 || F(x + alpha s) ||^2_2  this occurs
199:        at Q'(alpha) = s^T F'(x+alpha s)^T F(x+alpha s) = 0. If s is the Newton direction - F'(x)^(-1)F(x) then
200:        you get Q'(alpha) = -F(x)^T F'(x)^(-1)^T F'(x+alpha s)F(x+alpha s); when alpha = 0
201:        Q'(0) = - ||F(x)||^2_2 which is always NEGATIVE if F'(x) is invertible. This means the Newton
202:        direction is a descent direction and the line search should succeed if alpha is small enough.

204:        If F'(x) is NOT invertible AND F'(x)^T F(x) = 0 then Q'(0) = 0 and the Newton direction
205:        is NOT a descent direction so the line search will fail. All one can do at this point
206:        is change the initial guess and try again.

208:        An alternative explanation: Newton's method can be regarded as replacing the function with
209:        its linear approximation and minimizing the 2-norm of that. That is F(x+s) approx F(x) + F'(x)s
210:        so we minimize || F(x) + F'(x) s ||^2_2; do this using Least Squares. If F'(x) is invertible then
211:        s = - F'(x)^(-1)F(x) otherwise F'(x)^T F'(x) s = -F'(x)^T F(x). If F'(x)^T F(x) is NOT zero then there
212:        exists a nontrival (that is F'(x)s != 0) solution to the equation and this direction is
213:        s = - [F'(x)^T F'(x)]^(-1) F'(x)^T F(x) so Q'(0) = - F(x)^T F'(x) [F'(x)^T F'(x)]^(-T) F'(x)^T F(x)
214:        = - (F'(x)^T F(x)) [F'(x)^T F'(x)]^(-T) (F'(x)^T F(x)). Since we are assuming (F'(x)^T F(x)) != 0
215:        and F'(x)^T F'(x) has no negative eigenvalues Q'(0) < 0 so s is a descent direction and the line
216:        search should succeed for small enough alpha.

218:        Note that this RARELY happens in practice. Far more likely the linear system is not being solved
219:        (well enough?) or the Jacobian is wrong.

221:    SNES_DIVERGED_MAX_IT means that the solver reached the maximum number of iterations without satisfying any
222:    convergence criteria. SNES_CONVERGED_ITS means that SNESConvergedSkip() was chosen as the convergence test;
223:    thus the usual convergence criteria have not been checked and may or may not be satisfied.

225:    Developer Notes:
226:     this must match petsc/finclude/petscsnes.h

228:        The string versions of these are in SNESConvergedReasons, if you change any value here you must
229:      also adjust that array.

231:    Each reason has its own manual page.

233: .seealso: SNESSolve(), SNESGetConvergedReason(), KSPConvergedReason, SNESSetConvergenceTest()
234: E*/
235: typedef enum {/* converged */
236:               SNES_CONVERGED_FNORM_ABS         =  2, /* ||F|| < atol */
237:               SNES_CONVERGED_FNORM_RELATIVE    =  3, /* ||F|| < rtol*||F_initial|| */
238:               SNES_CONVERGED_SNORM_RELATIVE    =  4, /* Newton computed step size small; || delta x || < stol || x ||*/
239:               SNES_CONVERGED_ITS               =  5, /* maximum iterations reached */
240:               SNES_CONVERGED_TR_DELTA          =  7,
241:               /* diverged */
242:               SNES_DIVERGED_FUNCTION_DOMAIN     = -1, /* the new x location passed the function is not in the domain of F */
243:               SNES_DIVERGED_FUNCTION_COUNT      = -2,
244:               SNES_DIVERGED_LINEAR_SOLVE        = -3, /* the linear solve failed */
245:               SNES_DIVERGED_FNORM_NAN           = -4,
246:               SNES_DIVERGED_MAX_IT              = -5,
247:               SNES_DIVERGED_LINE_SEARCH         = -6, /* the line search failed */
248:               SNES_DIVERGED_INNER               = -7, /* inner solve failed */
249:               SNES_DIVERGED_LOCAL_MIN           = -8, /* || J^T b || is small, implies converged to local minimum of F() */
250:               SNES_DIVERGED_DTOL                = -9, /* || F || > divtol*||F_initial|| */
251:               SNES_DIVERGED_JACOBIAN_DOMAIN     = -10, /* Jacobian calculation does not make sense */

253:               SNES_CONVERGED_ITERATING          =  0} SNESConvergedReason;
254: PETSC_EXTERN const char *const*SNESConvergedReasons;

256: /*MC
257:      SNES_CONVERGED_FNORM_ABS - 2-norm(F) <= abstol

259:    Level: beginner

261: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

263: M*/

265: /*MC
266:      SNES_CONVERGED_FNORM_RELATIVE - 2-norm(F) <= rtol*2-norm(F(x_0)) where x_0 is the initial guess

268:    Level: beginner

270: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

272: M*/

274: /*MC
275:      SNES_CONVERGED_SNORM_RELATIVE - The 2-norm of the last step <= stol * 2-norm(x) where x is the current
276:           solution and stol is the 4th argument to SNESSetTolerances()

278:      Options Database Keys:
279:       -snes_stol <stol> - the step tolerance

281:    Level: beginner

283: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

285: M*/

287: /*MC
288:      SNES_DIVERGED_FUNCTION_COUNT - The user provided function has been called more times then the final
289:          argument to SNESSetTolerances()

291:    Level: beginner

293: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

295: M*/

297: /*MC
298:      SNES_DIVERGED_DTOL - The norm of the function has increased by a factor of divtol set with SNESSetDivergenceTolerance()

300:    Level: beginner

302: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances(), SNESSetDivergenceTolerance()

304: M*/

306: /*MC
307:      SNES_DIVERGED_FNORM_NAN - the 2-norm of the current function evaluation is not-a-number (NaN), this
308:       is usually caused by a division of 0 by 0.

310:    Level: beginner

312: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

314: M*/

316: /*MC
317:      SNES_DIVERGED_MAX_IT - SNESSolve() has reached the maximum number of iterations requested

319:    Level: beginner

321: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

323: M*/

325: /*MC
326:      SNES_DIVERGED_LINE_SEARCH - The line search has failed. This only occurs for a SNES solvers that use a line search

328:    Level: beginner

330: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances(), SNESLineSearch

332: M*/

334: /*MC
335:      SNES_DIVERGED_LOCAL_MIN - the algorithm seems to have stagnated at a local minimum that is not zero.
336:         See the manual page for SNESConvergedReason for more details

338:    Level: beginner

340: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

342: M*/

344: /*MC
345:      SNES_CONERGED_ITERATING - this only occurs if SNESGetConvergedReason() is called during the SNESSolve()

347:    Level: beginner

349: .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()

351: M*/

353: PETSC_EXTERN PetscErrorCode SNESSetConvergenceTest(SNES,PetscErrorCode (*)(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*),void*,PetscErrorCode (*)(void*));
354: PETSC_EXTERN PetscErrorCode SNESConvergedDefault(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*);
355: PETSC_EXTERN PetscErrorCode SNESConvergedSkip(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*);
356: PETSC_EXTERN PetscErrorCode SNESGetConvergedReason(SNES,SNESConvergedReason*);
357: PETSC_EXTERN PetscErrorCode SNESSetConvergedReason(SNES,SNESConvergedReason);

359: PETSC_DEPRECATED_FUNCTION("Use SNESConvergedSkip() (since version 3.5)") PETSC_STATIC_INLINE void SNESSkipConverged(void) { /* never called */ }
360: #define SNESSkipConverged (SNESSkipConverged, SNESConvergedSkip)

362: /* --------- Solving systems of nonlinear equations --------------- */
363: PETSC_EXTERN PetscErrorCode SNESSetFunction(SNES,Vec,PetscErrorCode (*)(SNES,Vec,Vec,void*),void*);
364: PETSC_EXTERN PetscErrorCode SNESGetFunction(SNES,Vec*,PetscErrorCode (**)(SNES,Vec,Vec,void*),void**);
365: PETSC_EXTERN PetscErrorCode SNESComputeFunction(SNES,Vec,Vec);
366: PETSC_EXTERN PetscErrorCode SNESSetInitialFunction(SNES,Vec);

368: PETSC_EXTERN PetscErrorCode SNESSetJacobian(SNES,Mat,Mat,PetscErrorCode (*)(SNES,Vec,Mat,Mat,void*),void*);
369: PETSC_EXTERN PetscErrorCode SNESGetJacobian(SNES,Mat*,Mat*,PetscErrorCode (**)(SNES,Vec,Mat,Mat,void*),void**);
370: PETSC_EXTERN PetscErrorCode SNESObjectiveComputeFunctionDefaultFD(SNES,Vec,Vec,void*);
371: PETSC_EXTERN PetscErrorCode SNESComputeJacobianDefault(SNES,Vec,Mat,Mat,void*);
372: PETSC_EXTERN PetscErrorCode SNESComputeJacobianDefaultColor(SNES,Vec,Mat,Mat,void*);
373: PETSC_EXTERN PetscErrorCode SNESSetComputeInitialGuess(SNES,PetscErrorCode (*)(SNES,Vec,void*),void*);
374: PETSC_EXTERN PetscErrorCode SNESSetPicard(SNES,Vec,PetscErrorCode (*)(SNES,Vec,Vec,void*),Mat,Mat,PetscErrorCode (*)(SNES,Vec,Mat,Mat,void*),void*);
375: PETSC_EXTERN PetscErrorCode SNESGetPicard(SNES,Vec*,PetscErrorCode (**)(SNES,Vec,Vec,void*),Mat*,Mat*,PetscErrorCode (**)(SNES,Vec,Mat,Mat,void*),void**);
376: PETSC_EXTERN PetscErrorCode SNESPicardComputeFunction(SNES,Vec,Vec,void *);
377: PETSC_EXTERN PetscErrorCode SNESPicardComputeJacobian(SNES,Vec,Mat,Mat,void*);

379: PETSC_EXTERN PetscErrorCode SNESSetObjective(SNES,PetscErrorCode (*)(SNES,Vec,PetscReal *,void*),void*);
380: PETSC_EXTERN PetscErrorCode SNESGetObjective(SNES,PetscErrorCode (**)(SNES,Vec,PetscReal *,void*),void**);
381: PETSC_EXTERN PetscErrorCode SNESComputeObjective(SNES,Vec,PetscReal *);

383: /*E
384:     SNESNormSchedule - Frequency with which the norm is computed

386:    Level: advanced

388:    Support for these is highly dependent on the solver.

390:    Notes:
391:    This is primarily used to turn off extra norm and function computation
392:    when the solvers are composed.

394: .seealso: SNESSolve(), SNESGetConvergedReason(), KSPSetNormType(),
395:           KSPSetConvergenceTest(), KSPSetPCSide()
396: E*/

398: typedef enum {SNES_NORM_DEFAULT            = -1,
399:               SNES_NORM_NONE               =  0,
400:               SNES_NORM_ALWAYS             =  1,
401:               SNES_NORM_INITIAL_ONLY       =  2,
402:               SNES_NORM_FINAL_ONLY         =  3,
403:               SNES_NORM_INITIAL_FINAL_ONLY =  4} SNESNormSchedule;
404: PETSC_EXTERN const char *const*const SNESNormSchedules;

406: /*MC
407:     SNES_NORM_NONE - Don't compute function and its L2 norm.

409:    Level: advanced

411:     Notes:
412:     This is most useful for stationary solvers with a fixed number of iterations used as smoothers.

414: .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_DEFAULT
415: M*/

417: /*MC
418:     SNES_NORM_ALWAYS - Compute the function and its L2 norm at each iteration.

420:    Level: advanced

422:     Notes:
423:     Most solvers will use this no matter what norm type is passed to them.

425: .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_NONE
426: M*/

428: /*MC
429:     SNES_NORM_INITIAL_ONLY - Compute the function and its L2 at iteration 0, but do not update it.

431:    Level: advanced

433:    Notes:
434:    This method is useful in composed methods, when a true solution might actually be found before SNESSolve() is called.
435:    This option enables the solve to abort on the zeroth iteration if this is the case.

437:    For solvers that require the computation of the L2 norm of the function as part of the method, this merely cancels
438:    the norm computation at the last iteration (if possible).

440: .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_FINAL_ONLY, SNES_NORM_INITIAL_FINAL_ONLY
441: M*/

443: /*MC
444:     SNES_NORM_FINAL_ONLY - Compute the function and its L2 norm on only the final iteration.

446:    Level: advanced

448:    Notes:
449:    For solvers that require the computation of the L2 norm of the function as part of the method, behaves
450:    exactly as SNES_NORM_DEFAULT.  This method is useful when the function is gotten after SNESSolve and
451:    used in subsequent computation for methods that do not need the norm computed during the rest of the
452:    solution procedure.

454: .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_INITIAL_ONLY, SNES_NORM_INITIAL_FINAL_ONLY
455: M*/

457: /*MC
458:     SNES_NORM_INITIAL_FINAL_ONLY - Compute the function and its L2 norm on only the initial and final iterations.

460:    Level: advanced

462:    Notes:
463:    This method combines the benefits of SNES_NORM_INITIAL_ONLY and SNES_NORM_FINAL_ONLY.

465: .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_SNES_NORM_INITIAL_ONLY, SNES_NORM_FINAL_ONLY
466: M*/

468: PETSC_EXTERN PetscErrorCode SNESSetNormSchedule(SNES,SNESNormSchedule);
469: PETSC_EXTERN PetscErrorCode SNESGetNormSchedule(SNES,SNESNormSchedule*);
470: PETSC_EXTERN PetscErrorCode SNESSetFunctionNorm(SNES,PetscReal);
471: PETSC_EXTERN PetscErrorCode SNESGetFunctionNorm(SNES,PetscReal*);
472: PETSC_EXTERN PetscErrorCode SNESGetUpdateNorm(SNES,PetscReal*);
473: PETSC_EXTERN PetscErrorCode SNESGetSolutionNorm(SNES,PetscReal*);

475: /*E
476:     SNESFunctionType - Type of function computed

478:    Level: advanced

480:    Support for these is highly dependent on the solver.

482: .seealso: SNESSolve(), SNESGetConvergedReason(), KSPSetNormType(),
483:           KSPSetConvergenceTest(), KSPSetPCSide()
484: E*/
485: typedef enum {SNES_FUNCTION_DEFAULT          = -1,
486:               SNES_FUNCTION_UNPRECONDITIONED =  0,
487:               SNES_FUNCTION_PRECONDITIONED   =  1} SNESFunctionType;
488: PETSC_EXTERN const char *const*const SNESFunctionTypes;

490: PETSC_EXTERN PetscErrorCode SNESSetFunctionType(SNES,SNESFunctionType);
491: PETSC_EXTERN PetscErrorCode SNESGetFunctionType(SNES,SNESFunctionType*);

493: PETSC_EXTERN PetscErrorCode SNESSetNGS(SNES,PetscErrorCode (*)(SNES,Vec,Vec,void*),void*);
494: PETSC_EXTERN PetscErrorCode SNESGetNGS(SNES,PetscErrorCode (**)(SNES,Vec,Vec,void*),void**);
495: PETSC_EXTERN PetscErrorCode SNESSetUseNGS(SNES,PetscBool);
496: PETSC_EXTERN PetscErrorCode SNESGetUseNGS(SNES,PetscBool *);
497: PETSC_EXTERN PetscErrorCode SNESComputeNGS(SNES,Vec,Vec);

499: PETSC_EXTERN PetscErrorCode SNESNGSSetSweeps(SNES,PetscInt);
500: PETSC_EXTERN PetscErrorCode SNESNGSGetSweeps(SNES,PetscInt *);
501: PETSC_EXTERN PetscErrorCode SNESNGSSetTolerances(SNES,PetscReal,PetscReal,PetscReal,PetscInt);
502: PETSC_EXTERN PetscErrorCode SNESNGSGetTolerances(SNES,PetscReal*,PetscReal*,PetscReal*,PetscInt*);

504: PETSC_EXTERN PetscErrorCode SNESUpdateCheckJacobian(SNES,PetscInt);

506: PETSC_EXTERN PetscErrorCode SNESSetAlwaysComputesFinalResidual(SNES,PetscBool);
507: PETSC_EXTERN PetscErrorCode SNESGetAlwaysComputesFinalResidual(SNES,PetscBool*);

509: PETSC_EXTERN PetscErrorCode SNESShellGetContext(SNES,void**);
510: PETSC_EXTERN PetscErrorCode SNESShellSetContext(SNES,void*);
511: PETSC_EXTERN PetscErrorCode SNESShellSetSolve(SNES,PetscErrorCode (*)(SNES,Vec));

513: /* --------- Routines specifically for line search methods --------------- */


516: /*S
517:      SNESLineSearch - Abstract PETSc object that manages line-search operations

519:    Level: beginner

521:   Concepts: nonlinear solvers, line search

523: .seealso:  SNESLineSearchCreate(), SNESLineSearchSetType(), SNES
524: S*/
525: typedef struct _p_LineSearch* SNESLineSearch;

527: /*J
528:     SNESLineSearchType - String with the name of a PETSc line search method

530:    Level: beginner

532: .seealso: SNESLineSearchSetType(), SNES
533: J*/
534: typedef const char* SNESLineSearchType;
535: #define SNESLINESEARCHBT                 "bt"
536: #define SNESLINESEARCHNLEQERR            "nleqerr"
537: #define SNESLINESEARCHBASIC              "basic"
538: #define SNESLINESEARCHL2                 "l2"
539: #define SNESLINESEARCHCP                 "cp"
540: #define SNESLINESEARCHSHELL              "shell"

542: PETSC_EXTERN PetscFunctionList SNESList;
543: PETSC_EXTERN PetscClassId      SNESLINESEARCH_CLASSID;
544: PETSC_EXTERN PetscFunctionList SNESLineSearchList;

546: #define SNES_LINESEARCH_ORDER_LINEAR    1
547: #define SNES_LINESEARCH_ORDER_QUADRATIC 2
548: #define SNES_LINESEARCH_ORDER_CUBIC     3

550: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchVIProjectFunc)(SNES,Vec);
551: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchVINormFunc)(SNES,Vec,Vec,PetscReal *);
552: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchApplyFunc)(SNESLineSearch);
553: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchUserFunc)(SNESLineSearch, void *);

555: PETSC_EXTERN PetscErrorCode SNESLineSearchCreate(MPI_Comm, SNESLineSearch*);
556: PETSC_EXTERN PetscErrorCode SNESLineSearchReset(SNESLineSearch);
557: PETSC_EXTERN PetscErrorCode SNESLineSearchView(SNESLineSearch,PetscViewer);
558: PETSC_EXTERN PetscErrorCode SNESLineSearchDestroy(SNESLineSearch *);
559: PETSC_EXTERN PetscErrorCode SNESLineSearchSetType(SNESLineSearch, SNESLineSearchType);
560: PETSC_EXTERN PetscErrorCode SNESLineSearchSetFromOptions(SNESLineSearch);
561: PETSC_EXTERN PetscErrorCode SNESLineSearchSetFunction(SNESLineSearch,PetscErrorCode (*)(SNES,Vec,Vec));
562: PETSC_EXTERN PetscErrorCode SNESLineSearchSetUp(SNESLineSearch);
563: PETSC_EXTERN PetscErrorCode SNESLineSearchApply(SNESLineSearch, Vec, Vec, PetscReal *, Vec);
564: PETSC_EXTERN PetscErrorCode SNESLineSearchPreCheck(SNESLineSearch,Vec,Vec,PetscBool *);
565: PETSC_EXTERN PetscErrorCode SNESLineSearchPostCheck(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *);
566: PETSC_EXTERN PetscErrorCode SNESLineSearchSetWorkVecs(SNESLineSearch, PetscInt);

568: /* set the functions for precheck and postcheck */

570: PETSC_EXTERN PetscErrorCode SNESLineSearchSetPreCheck(SNESLineSearch, PetscErrorCode (*)(SNESLineSearch,Vec,Vec,PetscBool*,void*), void *ctx);
571: PETSC_EXTERN PetscErrorCode SNESLineSearchSetPostCheck(SNESLineSearch, PetscErrorCode (*)(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *,void*), void *ctx);

573: PETSC_EXTERN PetscErrorCode SNESLineSearchGetPreCheck(SNESLineSearch, PetscErrorCode (**)(SNESLineSearch,Vec,Vec,PetscBool*,void*), void **ctx);
574: PETSC_EXTERN PetscErrorCode SNESLineSearchGetPostCheck(SNESLineSearch, PetscErrorCode (**)(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *,void*), void **ctx);

576: /* set the functions for VI-specific line search operations */

578: PETSC_EXTERN PetscErrorCode SNESLineSearchSetVIFunctions(SNESLineSearch, SNESLineSearchVIProjectFunc, SNESLineSearchVINormFunc);
579: PETSC_EXTERN PetscErrorCode SNESLineSearchGetVIFunctions(SNESLineSearch, SNESLineSearchVIProjectFunc*, SNESLineSearchVINormFunc*);

581: /* pointers to the associated SNES in order to be able to get the function evaluation out */
582: PETSC_EXTERN PetscErrorCode SNESLineSearchSetSNES(SNESLineSearch,SNES);
583: PETSC_EXTERN PetscErrorCode SNESLineSearchGetSNES(SNESLineSearch,SNES*);

585: /* set and get the parameters and vectors */
586: PETSC_EXTERN PetscErrorCode SNESLineSearchGetTolerances(SNESLineSearch,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscInt*);
587: PETSC_EXTERN PetscErrorCode SNESLineSearchSetTolerances(SNESLineSearch,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal,PetscInt);

589: PETSC_EXTERN PetscErrorCode SNESLineSearchPreCheckPicard(SNESLineSearch,Vec,Vec,PetscBool*,void*);

591: PETSC_EXTERN PetscErrorCode SNESLineSearchGetLambda(SNESLineSearch,PetscReal*);
592: PETSC_EXTERN PetscErrorCode SNESLineSearchSetLambda(SNESLineSearch,PetscReal);

594: PETSC_EXTERN PetscErrorCode SNESLineSearchGetDamping(SNESLineSearch,PetscReal*);
595: PETSC_EXTERN PetscErrorCode SNESLineSearchSetDamping(SNESLineSearch,PetscReal);

597: PETSC_EXTERN PetscErrorCode SNESLineSearchGetOrder(SNESLineSearch,PetscInt *order);
598: PETSC_EXTERN PetscErrorCode SNESLineSearchSetOrder(SNESLineSearch,PetscInt order);

600: /*E
601:     SNESLineSearchReason - if line search has succeeded or failed and why

603:    Level: intermediate

605:    Developer Notes:
606:     this must match petsc/finclude/petscsnes.h

608:    Developer Note: The string versions of these are in SNESLineSearchReasons, if you change any value here you must
609:      also adjust that array.

611: .seealso: SNESSolve(), SNESGetConvergedReason(), KSPConvergedReason, SNESSetConvergenceTest()
612: E*/
613: typedef enum {SNES_LINESEARCH_SUCCEEDED,
614:               SNES_LINESEARCH_FAILED_NANORINF,
615:               SNES_LINESEARCH_FAILED_DOMAIN,
616:               SNES_LINESEARCH_FAILED_REDUCT,       /* INSUFFICENT REDUCTION */
617:               SNES_LINESEARCH_FAILED_USER,
618:               SNES_LINESEARCH_FAILED_FUNCTION} SNESLineSearchReason;

620: PETSC_EXTERN PetscErrorCode SNESLineSearchGetReason(SNESLineSearch, SNESLineSearchReason*);
621: PETSC_EXTERN PetscErrorCode SNESLineSearchSetReason(SNESLineSearch, SNESLineSearchReason);

623: PETSC_EXTERN PetscErrorCode SNESLineSearchGetVecs(SNESLineSearch,Vec*,Vec*,Vec*,Vec*,Vec*);
624: PETSC_EXTERN PetscErrorCode SNESLineSearchSetVecs(SNESLineSearch,Vec,Vec,Vec,Vec,Vec);

626: PETSC_EXTERN PetscErrorCode SNESLineSearchGetNorms(SNESLineSearch, PetscReal *, PetscReal *, PetscReal *);
627: PETSC_EXTERN PetscErrorCode SNESLineSearchSetNorms(SNESLineSearch, PetscReal, PetscReal, PetscReal);
628: PETSC_EXTERN PetscErrorCode SNESLineSearchComputeNorms(SNESLineSearch);
629: PETSC_EXTERN PetscErrorCode SNESLineSearchSetComputeNorms(SNESLineSearch, PetscBool);

631: PETSC_EXTERN PetscErrorCode SNESLineSearchMonitor(SNESLineSearch);
632: PETSC_EXTERN PetscErrorCode SNESLineSearchMonitorSet(SNESLineSearch,PetscErrorCode(*)(SNESLineSearch,void*),void *,PetscErrorCode (*)(void**));
633: PETSC_EXTERN PetscErrorCode SNESLineSearchMonitorSetFromOptions(SNESLineSearch,const char[],const char[],const char[],PetscErrorCode (*)(SNESLineSearch,PetscViewerAndFormat*),PetscErrorCode (*)(SNESLineSearch,PetscViewerAndFormat*));
634: PETSC_EXTERN PetscErrorCode SNESLineSearchMonitorCancel(SNESLineSearch);
635: PETSC_EXTERN PetscErrorCode SNESLineSearchMonitorUpdate(SNESLineSearch,PetscViewerAndFormat*);
636: PETSC_EXTERN PetscErrorCode SNESLineSearchSetDefaultMonitor(SNESLineSearch,PetscViewer);
637: PETSC_EXTERN PetscErrorCode SNESLineSearchGetDefaultMonitor(SNESLineSearch,PetscViewer*);
638: PETSC_EXTERN PetscErrorCode SNESLineSearchMonitorSolutionUpdate(SNESLineSearch,PetscViewerAndFormat*);

640: PETSC_EXTERN PetscErrorCode SNESLineSearchAppendOptionsPrefix(SNESLineSearch, const char prefix[]);
641: PETSC_EXTERN PetscErrorCode SNESLineSearchGetOptionsPrefix(SNESLineSearch, const char *prefix[]);


644: /* Shell interface functions */
645: PETSC_EXTERN PetscErrorCode SNESLineSearchShellSetUserFunc(SNESLineSearch,SNESLineSearchUserFunc,void*);
646: PETSC_EXTERN PetscErrorCode SNESLineSearchShellGetUserFunc(SNESLineSearch,SNESLineSearchUserFunc*,void**);

648: /* BT interface functions */
649: PETSC_EXTERN PetscErrorCode SNESLineSearchBTSetAlpha(SNESLineSearch, PetscReal);
650: PETSC_EXTERN PetscErrorCode SNESLineSearchBTGetAlpha(SNESLineSearch, PetscReal*);

652: /*register line search types */
653: PETSC_EXTERN PetscErrorCode SNESLineSearchRegister(const char[],PetscErrorCode(*)(SNESLineSearch));

655: /* Routines for VI solver */
656: PETSC_EXTERN PetscErrorCode SNESVISetVariableBounds(SNES,Vec,Vec);
657: PETSC_EXTERN PetscErrorCode SNESVISetComputeVariableBounds(SNES, PetscErrorCode (*)(SNES,Vec,Vec));
658: PETSC_EXTERN PetscErrorCode SNESVIGetInactiveSet(SNES,IS*);
659: PETSC_EXTERN PetscErrorCode SNESVIGetActiveSetIS(SNES,Vec,Vec,IS*);
660: PETSC_EXTERN PetscErrorCode SNESVIComputeInactiveSetFnorm(SNES,Vec,Vec,PetscReal*);
661: PETSC_EXTERN PetscErrorCode SNESVISetRedundancyCheck(SNES,PetscErrorCode(*)(SNES,IS,IS*,void*),void*);

663: PETSC_EXTERN PetscErrorCode SNESTestLocalMin(SNES);

665: /* Should this routine be private? */
666: PETSC_EXTERN PetscErrorCode SNESComputeJacobian(SNES,Vec,Mat,Mat);
667: PETSC_EXTERN PetscErrorCode SNESTestJacobian(SNES);

669: PETSC_EXTERN PetscErrorCode SNESSetDM(SNES,DM);
670: PETSC_EXTERN PetscErrorCode SNESGetDM(SNES,DM*);
671: PETSC_EXTERN PetscErrorCode SNESSetNPC(SNES,SNES);
672: PETSC_EXTERN PetscErrorCode SNESGetNPC(SNES,SNES*);
673: PETSC_EXTERN PetscErrorCode SNESHasNPC(SNES,PetscBool*);
674: PETSC_EXTERN PetscErrorCode SNESApplyNPC(SNES,Vec,Vec,Vec);
675: PETSC_EXTERN PetscErrorCode SNESGetNPCFunction(SNES,Vec,PetscReal*);
676: PETSC_EXTERN PetscErrorCode SNESComputeFunctionDefaultNPC(SNES,Vec,Vec);
677: PETSC_EXTERN PetscErrorCode SNESSetNPCSide(SNES,PCSide);
678: PETSC_EXTERN PetscErrorCode SNESGetNPCSide(SNES,PCSide*);
679: PETSC_EXTERN PetscErrorCode SNESSetLineSearch(SNES,SNESLineSearch);
680: PETSC_EXTERN PetscErrorCode SNESGetLineSearch(SNES,SNESLineSearch*);
681: PETSC_EXTERN PetscErrorCode SNESRestrictHookAdd(SNES,PetscErrorCode (*)(SNES,SNES,void*),void*);
682: PETSC_EXTERN PetscErrorCode SNESRestrictHooksRun(SNES,SNES);

684: PETSC_DEPRECATED_FUNCTION("Use SNESGetLineSearch() (since version 3.4)") PETSC_STATIC_INLINE PetscErrorCode SNESGetSNESLineSearch(SNES snes,SNESLineSearch *ls) {return SNESGetLineSearch(snes,ls);}
685: PETSC_DEPRECATED_FUNCTION("Use SNESSetLineSearch() (since version 3.4)") PETSC_STATIC_INLINE PetscErrorCode SNESSetSNESLineSearch(SNES snes,SNESLineSearch ls) {return SNESSetLineSearch(snes,ls);}

687: PETSC_EXTERN PetscErrorCode SNESSetUpMatrices(SNES);
688: PETSC_EXTERN PetscErrorCode DMSNESSetFunction(DM,PetscErrorCode(*)(SNES,Vec,Vec,void*),void*);
689: PETSC_EXTERN PetscErrorCode DMSNESGetFunction(DM,PetscErrorCode(**)(SNES,Vec,Vec,void*),void**);
690: PETSC_EXTERN PetscErrorCode DMSNESSetNGS(DM,PetscErrorCode(*)(SNES,Vec,Vec,void*),void*);
691: PETSC_EXTERN PetscErrorCode DMSNESGetNGS(DM,PetscErrorCode(**)(SNES,Vec,Vec,void*),void**);
692: PETSC_EXTERN PetscErrorCode DMSNESSetJacobian(DM,PetscErrorCode(*)(SNES,Vec,Mat,Mat,void*),void*);
693: PETSC_EXTERN PetscErrorCode DMSNESGetJacobian(DM,PetscErrorCode(**)(SNES,Vec,Mat,Mat,void*),void**);
694: PETSC_EXTERN PetscErrorCode DMSNESSetPicard(DM,PetscErrorCode(*)(SNES,Vec,Vec,void*),PetscErrorCode(*)(SNES,Vec,Mat,Mat,void*),void*);
695: PETSC_EXTERN PetscErrorCode DMSNESGetPicard(DM,PetscErrorCode(**)(SNES,Vec,Vec,void*),PetscErrorCode(**)(SNES,Vec,Mat,Mat,void*),void**);
696: PETSC_EXTERN PetscErrorCode DMSNESSetObjective(DM,PetscErrorCode (*)(SNES,Vec,PetscReal *,void*),void*);
697: PETSC_EXTERN PetscErrorCode DMSNESGetObjective(DM,PetscErrorCode (**)(SNES,Vec,PetscReal *,void*),void**);
698: PETSC_EXTERN PetscErrorCode DMCopyDMSNES(DM,DM);

700: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESFunction)(DMDALocalInfo*,void*,void*,void*);
701: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESJacobian)(DMDALocalInfo*,void*,Mat,Mat,void*);
702: PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESObjective)(DMDALocalInfo*,void*,PetscReal*,void*);

704: PETSC_EXTERN PetscErrorCode DMDASNESSetFunctionLocal(DM,InsertMode,DMDASNESFunction,void*);
705: PETSC_EXTERN PetscErrorCode DMDASNESSetJacobianLocal(DM,DMDASNESJacobian,void*);
706: PETSC_EXTERN PetscErrorCode DMDASNESSetObjectiveLocal(DM,DMDASNESObjective,void*);
707: PETSC_EXTERN PetscErrorCode DMDASNESSetPicardLocal(DM,InsertMode,PetscErrorCode (*)(DMDALocalInfo*,void*,void*,void*),PetscErrorCode (*)(DMDALocalInfo*,void*,Mat,Mat,void*),void*);

709: PETSC_EXTERN PetscErrorCode DMPlexSNESGetGeometryFVM(DM,Vec*,Vec*,PetscReal*);
710: PETSC_EXTERN PetscErrorCode DMPlexSNESGetGradientDM(DM,PetscFV,DM*);

712: PETSC_EXTERN PetscErrorCode DMSNESSetBoundaryLocal(DM,PetscErrorCode (*)(DM,Vec,void*),void*);
713: PETSC_EXTERN PetscErrorCode DMSNESSetFunctionLocal(DM,PetscErrorCode (*)(DM,Vec,Vec,void*),void*);
714: PETSC_EXTERN PetscErrorCode DMSNESSetJacobianLocal(DM,PetscErrorCode (*)(DM,Vec,Mat,Mat,void*),void*);

716: /* Routines for Multiblock solver */
717: PETSC_EXTERN PetscErrorCode SNESMultiblockSetFields(SNES, const char [], PetscInt, const PetscInt *);
718: PETSC_EXTERN PetscErrorCode SNESMultiblockSetIS(SNES, const char [], IS);
719: PETSC_EXTERN PetscErrorCode SNESMultiblockSetBlockSize(SNES, PetscInt);
720: PETSC_EXTERN PetscErrorCode SNESMultiblockSetType(SNES, PCCompositeType);

722: /*J
723:     SNESMSType - String with the name of a PETSc SNESMS method.

725:    Level: intermediate

727: .seealso: SNESMSSetType(), SNES
728: J*/
729: typedef const char* SNESMSType;
730: #define SNESMSM62       "m62"
731: #define SNESMSEULER     "euler"
732: #define SNESMSJAMESON83 "jameson83"
733: #define SNESMSVLTP21    "vltp21"
734: #define SNESMSVLTP31    "vltp31"
735: #define SNESMSVLTP41    "vltp41"
736: #define SNESMSVLTP51    "vltp51"
737: #define SNESMSVLTP61    "vltp61"

739: PETSC_EXTERN PetscErrorCode SNESMSRegister(SNESMSType,PetscInt,PetscInt,PetscReal,const PetscReal[],const PetscReal[],const PetscReal[]);
740: PETSC_EXTERN PetscErrorCode SNESMSSetType(SNES,SNESMSType);
741: PETSC_EXTERN PetscErrorCode SNESMSFinalizePackage(void);
742: PETSC_EXTERN PetscErrorCode SNESMSInitializePackage(void);
743: PETSC_EXTERN PetscErrorCode SNESMSRegisterDestroy(void);

745: /* routines for NGMRES solver */

747: typedef enum {
748:   SNES_NGMRES_RESTART_NONE       = 0,
749:   SNES_NGMRES_RESTART_PERIODIC   = 1,
750:   SNES_NGMRES_RESTART_DIFFERENCE = 2} SNESNGMRESRestartType;
751: PETSC_EXTERN const char *const SNESNGMRESRestartTypes[];

753: typedef enum {
754:   SNES_NGMRES_SELECT_NONE       = 0,
755:   SNES_NGMRES_SELECT_DIFFERENCE = 1,
756:   SNES_NGMRES_SELECT_LINESEARCH = 2} SNESNGMRESSelectType;
757: PETSC_EXTERN const char *const SNESNGMRESSelectTypes[];

759: PETSC_EXTERN PetscErrorCode SNESNGMRESSetRestartType(SNES, SNESNGMRESRestartType);
760: PETSC_EXTERN PetscErrorCode SNESNGMRESSetSelectType(SNES, SNESNGMRESSelectType);
761: PETSC_EXTERN PetscErrorCode SNESNGMRESSetRestartFmRise(SNES, PetscBool);
762: PETSC_EXTERN PetscErrorCode SNESNGMRESGetRestartFmRise(SNES, PetscBool*);

764: /* routines for NCG solver */

766: typedef enum {
767:   SNES_NCG_FR    = 0,
768:   SNES_NCG_PRP   = 1,
769:   SNES_NCG_HS    = 2,
770:   SNES_NCG_DY    = 3,
771:   SNES_NCG_CD    = 4} SNESNCGType;
772: PETSC_EXTERN const char *const SNESNCGTypes[];

774: PETSC_EXTERN PetscErrorCode SNESNCGSetType(SNES, SNESNCGType);

776: typedef enum {SNES_QN_SCALE_DEFAULT    = 0,
777:               SNES_QN_SCALE_NONE       = 1,
778:               SNES_QN_SCALE_SHANNO     = 2,
779:               SNES_QN_SCALE_LINESEARCH = 3,
780:               SNES_QN_SCALE_JACOBIAN   = 4} SNESQNScaleType;
781: PETSC_EXTERN const char *const SNESQNScaleTypes[];
782: typedef enum {SNES_QN_RESTART_DEFAULT  = 0,
783:               SNES_QN_RESTART_NONE     = 1,
784:               SNES_QN_RESTART_POWELL   = 2,
785:               SNES_QN_RESTART_PERIODIC = 3} SNESQNRestartType;
786: PETSC_EXTERN const char *const SNESQNRestartTypes[];
787: typedef enum {SNES_QN_LBFGS      = 0,
788:               SNES_QN_BROYDEN    = 1,
789:               SNES_QN_BADBROYDEN = 2
790:              } SNESQNType;
791: PETSC_EXTERN const char *const SNESQNTypes[];

793: PETSC_EXTERN PetscErrorCode SNESQNSetType(SNES, SNESQNType);
794: PETSC_EXTERN PetscErrorCode SNESQNSetScaleType(SNES, SNESQNScaleType);
795: PETSC_EXTERN PetscErrorCode SNESQNSetRestartType(SNES, SNESQNRestartType);

797: PETSC_EXTERN PetscErrorCode SNESNASMGetType(SNES,PCASMType*);
798: PETSC_EXTERN PetscErrorCode SNESNASMSetType(SNES,PCASMType);
799: PETSC_EXTERN PetscErrorCode SNESNASMGetSubdomains(SNES,PetscInt*,SNES**,VecScatter**,VecScatter**,VecScatter**);
800: PETSC_EXTERN PetscErrorCode SNESNASMSetSubdomains(SNES,PetscInt,SNES*,VecScatter*,VecScatter*,VecScatter*);
801: PETSC_EXTERN PetscErrorCode SNESNASMSetDamping(SNES,PetscReal);
802: PETSC_EXTERN PetscErrorCode SNESNASMGetDamping(SNES,PetscReal*);
803: PETSC_EXTERN PetscErrorCode SNESNASMGetSubdomainVecs(SNES,PetscInt*,Vec**,Vec**,Vec**,Vec**);
804: PETSC_EXTERN PetscErrorCode SNESNASMSetComputeFinalJacobian(SNES,PetscBool);
805: PETSC_EXTERN PetscErrorCode SNESNASMGetSNES(SNES,PetscInt,SNES *);
806: PETSC_EXTERN PetscErrorCode SNESNASMGetNumber(SNES,PetscInt*);
807: PETSC_EXTERN PetscErrorCode SNESNASMSetWeight(SNES,Vec);

809: typedef enum {SNES_COMPOSITE_ADDITIVE,SNES_COMPOSITE_MULTIPLICATIVE,SNES_COMPOSITE_ADDITIVEOPTIMAL} SNESCompositeType;
810: PETSC_EXTERN const char *const SNESCompositeTypes[];

812: PETSC_EXTERN PetscErrorCode SNESCompositeSetType(SNES,SNESCompositeType);
813: PETSC_EXTERN PetscErrorCode SNESCompositeAddSNES(SNES,SNESType);
814: PETSC_EXTERN PetscErrorCode SNESCompositeGetSNES(SNES,PetscInt,SNES *);
815: PETSC_EXTERN PetscErrorCode SNESCompositeGetNumber(SNES,PetscInt*);
816: PETSC_EXTERN PetscErrorCode SNESCompositeSetDamping(SNES,PetscInt,PetscReal);

818: PETSC_EXTERN PetscErrorCode SNESPatchSetDiscretisationInfo(SNES,PetscInt,DM*,PetscInt*,PetscInt*,const PetscInt**,const PetscInt*,PetscInt,const PetscInt*,PetscInt,const PetscInt*);
819: PETSC_EXTERN PetscErrorCode SNESPatchSetComputeOperator(SNES, PetscErrorCode (*func)(PC, PetscInt, Vec, Mat, IS, PetscInt, const PetscInt *, const PetscInt *, void *), void*);
820: PETSC_EXTERN PetscErrorCode SNESPatchSetComputeFunction(SNES, PetscErrorCode (*func)(PC, PetscInt, Vec, Vec, IS, PetscInt, const PetscInt *, const PetscInt *, void *), void*);
821: PETSC_EXTERN PetscErrorCode SNESPatchSetConstructType(SNES,PCPatchConstructType, PetscErrorCode (*func)(PC, PetscInt *, IS **, IS *, void *), void*);
822: PETSC_EXTERN PetscErrorCode SNESPatchSetCellNumbering(SNES,PetscSection);

824: /*E
825:     SNESFASType - Determines the type of nonlinear multigrid method that is run.

827:    Level: beginner

829:    Values:
830: +  SNES_FAS_MULTIPLICATIVE (default) - traditional V or W cycle as determined by SNESFASSetCycles()
831: .  SNES_FAS_ADDITIVE                 - additive FAS cycle
832: .  SNES_FAS_FULL                     - full FAS cycle
833: -  SNES_FAS_KASKADE                  - Kaskade FAS cycle
834: .seealso: PCMGSetType(), PCMGType

836: E*/
837: typedef enum { SNES_FAS_MULTIPLICATIVE, SNES_FAS_ADDITIVE, SNES_FAS_FULL, SNES_FAS_KASKADE } SNESFASType;
838: PETSC_EXTERN const char *const  SNESFASTypes[];

840: /* called on the finest level FAS instance*/
841: PETSC_EXTERN PetscErrorCode SNESFASSetType(SNES, SNESFASType);
842: PETSC_EXTERN PetscErrorCode SNESFASGetType(SNES, SNESFASType*);
843: PETSC_EXTERN PetscErrorCode SNESFASSetLevels(SNES, PetscInt, MPI_Comm *);
844: PETSC_EXTERN PetscErrorCode SNESFASGetLevels(SNES, PetscInt *);
845: PETSC_EXTERN PetscErrorCode SNESFASGetCycleSNES(SNES, PetscInt, SNES*);
846: PETSC_EXTERN PetscErrorCode SNESFASSetNumberSmoothUp(SNES, PetscInt);
847: PETSC_EXTERN PetscErrorCode SNESFASSetNumberSmoothDown(SNES, PetscInt);
848: PETSC_EXTERN PetscErrorCode SNESFASSetCycles(SNES, PetscInt);
849: PETSC_EXTERN PetscErrorCode SNESFASSetMonitor(SNES, PetscViewerAndFormat *, PetscBool);
850: PETSC_EXTERN PetscErrorCode SNESFASSetLog(SNES, PetscBool);

852: PETSC_EXTERN PetscErrorCode SNESFASSetGalerkin(SNES, PetscBool);
853: PETSC_EXTERN PetscErrorCode SNESFASGetGalerkin(SNES, PetscBool*);
854: PETSC_EXTERN PetscErrorCode SNESFASGalerkinFunctionDefault(SNES,Vec,Vec,void*);

856: /* called on any level -- "Cycle" FAS instance */
857: PETSC_EXTERN PetscErrorCode SNESFASCycleGetSmoother(SNES, SNES*);
858: PETSC_EXTERN PetscErrorCode SNESFASCycleGetSmootherUp(SNES, SNES*);
859: PETSC_EXTERN PetscErrorCode SNESFASCycleGetSmootherDown(SNES, SNES*);
860: PETSC_EXTERN PetscErrorCode SNESFASCycleGetCorrection(SNES, SNES*);
861: PETSC_EXTERN PetscErrorCode SNESFASCycleGetInterpolation(SNES, Mat*);
862: PETSC_EXTERN PetscErrorCode SNESFASCycleGetRestriction(SNES, Mat*);
863: PETSC_EXTERN PetscErrorCode SNESFASCycleGetInjection(SNES, Mat*);
864: PETSC_EXTERN PetscErrorCode SNESFASCycleGetRScale(SNES, Vec*);
865: PETSC_EXTERN PetscErrorCode SNESFASCycleSetCycles(SNES, PetscInt);
866: PETSC_EXTERN PetscErrorCode SNESFASCycleIsFine(SNES, PetscBool*);

868: /* called on the (outer) finest level FAS to set/get parameters on any level instance */
869: PETSC_EXTERN PetscErrorCode SNESFASSetInterpolation(SNES, PetscInt, Mat);
870: PETSC_EXTERN PetscErrorCode SNESFASGetInterpolation(SNES, PetscInt, Mat*);
871: PETSC_EXTERN PetscErrorCode SNESFASSetRestriction(SNES, PetscInt, Mat);
872: PETSC_EXTERN PetscErrorCode SNESFASGetRestriction(SNES, PetscInt, Mat*);
873: PETSC_EXTERN PetscErrorCode SNESFASSetInjection(SNES, PetscInt, Mat);
874: PETSC_EXTERN PetscErrorCode SNESFASGetInjection(SNES, PetscInt, Mat*);
875: PETSC_EXTERN PetscErrorCode SNESFASSetRScale(SNES, PetscInt, Vec);
876: PETSC_EXTERN PetscErrorCode SNESFASGetRScale(SNES, PetscInt, Vec*);
877: PETSC_EXTERN PetscErrorCode SNESFASSetContinuation(SNES,PetscBool);

879: PETSC_EXTERN PetscErrorCode SNESFASGetSmoother(SNES,     PetscInt, SNES*);
880: PETSC_EXTERN PetscErrorCode SNESFASGetSmootherUp(SNES,   PetscInt, SNES*);
881: PETSC_EXTERN PetscErrorCode SNESFASGetSmootherDown(SNES, PetscInt, SNES*);
882: PETSC_EXTERN PetscErrorCode SNESFASGetCoarseSolve(SNES, SNES*);

884: /* parameters for full FAS */
885: PETSC_EXTERN PetscErrorCode SNESFASFullSetDownSweep(SNES,PetscBool);
886: PETSC_EXTERN PetscErrorCode SNESFASCreateCoarseVec(SNES,Vec*);
887: PETSC_EXTERN PetscErrorCode SNESFASRestrict(SNES,Vec,Vec);

889: PETSC_EXTERN PetscErrorCode DMSNESCheckDiscretization(SNES,DM,Vec,PetscErrorCode (**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar*,void*),void**,PetscReal);
890: PETSC_EXTERN PetscErrorCode DMSNESCheckResidual(SNES,DM,Vec,PetscReal);
891: PETSC_EXTERN PetscErrorCode DMSNESCheckJacobian(SNES,DM,Vec,PetscReal);
892: PETSC_EXTERN PetscErrorCode DMSNESCheckFromOptions(SNES,Vec,PetscErrorCode (**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar*,void*),void**);

894: #endif