Actual source code: petscksp.h

petsc-master 2021-02-25
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  1: /*
  2:    Defines the interface functions for the Krylov subspace accelerators.
  3: */
  4: #ifndef PETSCKSP_H
  5: #define PETSCKSP_H
  6: #include <petscpc.h>

  8: PETSC_EXTERN PetscErrorCode KSPInitializePackage(void);

 10: /*S
 11:      KSP - Abstract PETSc object that manages all Krylov methods. This is the object that manages the
 12:          linear solves in PETSc (even those such as direct solvers that do no use Krylov accelerators).

 14:    Level: beginner

 16:         Notes:
 17:     When a direct solver is used, but no Krylov solver is used, the KSP object is still used but with a
 18:        KSPType of KSPPREONLY, meaning that only application of the preconditioner is used as the linear solver.

 20: .seealso:  KSPCreate(), KSPSetType(), KSPType, SNES, TS, PC, KSP, KSPDestroy(), KSPCG, KSPGMRES
 21: S*/
 22: typedef struct _p_KSP*     KSP;

 24: /*J
 25:     KSPType - String with the name of a PETSc Krylov method.

 27:    Level: beginner

 29: .seealso: KSPSetType(), KSP, KSPRegister(), KSPCreate(), KSPSetFromOptions()
 30: J*/
 31: typedef const char* KSPType;
 32: #define KSPRICHARDSON "richardson"
 33: #define KSPCHEBYSHEV  "chebyshev"
 34: #define KSPCG         "cg"
 35: #define KSPGROPPCG    "groppcg"
 36: #define KSPPIPECG     "pipecg"
 37: #define KSPPIPECGRR   "pipecgrr"
 38: #define KSPPIPELCG     "pipelcg"
 39: #define KSPPIPEPRCG    "pipeprcg"
 40: #define KSPPIPECG2     "pipecg2"
 41: #define   KSPCGNE       "cgne"
 42: #define   KSPNASH       "nash"
 43: #define   KSPSTCG       "stcg"
 44: #define   KSPGLTR       "gltr"
 45: #define     KSPCGNASH  PETSC_DEPRECATED_MACRO("GCC warning \"KSPCGNASH macro is deprecated use KSPNASH (since version 3.11)\"")  "nash"
 46: #define     KSPCGSTCG  PETSC_DEPRECATED_MACRO("GCC warning \"KSPCGSTCG macro is deprecated use KSPSTCG (since version 3.11)\"")  "stcg"
 47: #define     KSPCGGLTR  PETSC_DEPRECATED_MACRO("GCC warning \"KSPCGGLTR macro is deprecated use KSPSGLTR (since version 3.11)\"") "gltr"
 48: #define KSPFCG        "fcg"
 49: #define KSPPIPEFCG    "pipefcg"
 50: #define KSPGMRES      "gmres"
 51: #define KSPPIPEFGMRES "pipefgmres"
 52: #define   KSPFGMRES     "fgmres"
 53: #define   KSPLGMRES     "lgmres"
 54: #define   KSPDGMRES     "dgmres"
 55: #define   KSPPGMRES     "pgmres"
 56: #define KSPTCQMR      "tcqmr"
 57: #define KSPBCGS       "bcgs"
 58: #define   KSPIBCGS      "ibcgs"
 59: #define   KSPFBCGS      "fbcgs"
 60: #define   KSPFBCGSR     "fbcgsr"
 61: #define   KSPBCGSL      "bcgsl"
 62: #define   KSPPIPEBCGS   "pipebcgs"
 63: #define KSPCGS        "cgs"
 64: #define KSPTFQMR      "tfqmr"
 65: #define KSPCR         "cr"
 66: #define KSPPIPECR     "pipecr"
 67: #define KSPLSQR       "lsqr"
 68: #define KSPPREONLY    "preonly"
 69: #define KSPQCG        "qcg"
 70: #define KSPBICG       "bicg"
 71: #define KSPMINRES     "minres"
 72: #define KSPSYMMLQ     "symmlq"
 73: #define KSPLCD        "lcd"
 74: #define KSPPYTHON     "python"
 75: #define KSPGCR        "gcr"
 76: #define KSPPIPEGCR    "pipegcr"
 77: #define KSPTSIRM      "tsirm"
 78: #define KSPCGLS       "cgls"
 79: #define KSPFETIDP     "fetidp"
 80: #define KSPHPDDM      "hpddm"

 82: /* Logging support */
 83: PETSC_EXTERN PetscClassId KSP_CLASSID;
 84: PETSC_EXTERN PetscClassId KSPGUESS_CLASSID;
 85: PETSC_EXTERN PetscClassId DMKSP_CLASSID;

 87: PETSC_EXTERN PetscErrorCode KSPCreate(MPI_Comm,KSP*);
 88: PETSC_EXTERN PetscErrorCode KSPSetType(KSP,KSPType);
 89: PETSC_EXTERN PetscErrorCode KSPGetType(KSP,KSPType*);
 90: PETSC_EXTERN PetscErrorCode KSPSetUp(KSP);
 91: PETSC_EXTERN PetscErrorCode KSPSetUpOnBlocks(KSP);
 92: PETSC_EXTERN PetscErrorCode KSPSolve(KSP,Vec,Vec);
 93: PETSC_EXTERN PetscErrorCode KSPSolveTranspose(KSP,Vec,Vec);
 94: PETSC_EXTERN PetscErrorCode KSPSetUseExplicitTranspose(KSP,PetscBool);
 95: PETSC_EXTERN PetscErrorCode KSPMatSolve(KSP,Mat,Mat);
 96: PETSC_EXTERN PetscErrorCode KSPSetMatSolveBlockSize(KSP,PetscInt);
 97: PETSC_EXTERN PetscErrorCode KSPGetMatSolveBlockSize(KSP,PetscInt*);
 98: PETSC_EXTERN PetscErrorCode KSPReset(KSP);
 99: PETSC_EXTERN PetscErrorCode KSPResetViewers(KSP);
100: PETSC_EXTERN PetscErrorCode KSPDestroy(KSP*);
101: PETSC_EXTERN PetscErrorCode KSPSetReusePreconditioner(KSP,PetscBool);
102: PETSC_EXTERN PetscErrorCode KSPGetReusePreconditioner(KSP,PetscBool*);
103: PETSC_EXTERN PetscErrorCode KSPSetSkipPCSetFromOptions(KSP,PetscBool);
104: PETSC_EXTERN PetscErrorCode KSPCheckSolve(KSP,PC,Vec);

106: PETSC_EXTERN PetscFunctionList KSPList;
107: PETSC_EXTERN PetscFunctionList KSPGuessList;
108: PETSC_EXTERN PetscFunctionList KSPMonitorList;
109: PETSC_EXTERN PetscFunctionList KSPMonitorCreateList;
110: PETSC_EXTERN PetscFunctionList KSPMonitorDestroyList;
111: PETSC_EXTERN PetscErrorCode KSPRegister(const char[],PetscErrorCode (*)(KSP));
112: PETSC_EXTERN PetscErrorCode KSPMonitorRegister(const char[], PetscViewerType, PetscViewerFormat, PetscErrorCode (*)(KSP, PetscInt, PetscReal, PetscViewerAndFormat *), PetscErrorCode (*)(PetscViewer, PetscViewerFormat, void *, PetscViewerAndFormat **), PetscErrorCode (*)(PetscViewerAndFormat **));

114: PETSC_EXTERN PetscErrorCode KSPSetPCSide(KSP,PCSide);
115: PETSC_EXTERN PetscErrorCode KSPGetPCSide(KSP,PCSide*);
116: PETSC_EXTERN PetscErrorCode KSPSetTolerances(KSP,PetscReal,PetscReal,PetscReal,PetscInt);
117: PETSC_EXTERN PetscErrorCode KSPGetTolerances(KSP,PetscReal*,PetscReal*,PetscReal*,PetscInt*);
118: PETSC_EXTERN PetscErrorCode KSPSetInitialGuessNonzero(KSP,PetscBool);
119: PETSC_EXTERN PetscErrorCode KSPGetInitialGuessNonzero(KSP,PetscBool*);
120: PETSC_EXTERN PetscErrorCode KSPSetErrorIfNotConverged(KSP,PetscBool);
121: PETSC_EXTERN PetscErrorCode KSPGetErrorIfNotConverged(KSP,PetscBool*);
122: PETSC_EXTERN PetscErrorCode KSPSetComputeEigenvalues(KSP,PetscBool);
123: PETSC_EXTERN PetscErrorCode KSPSetComputeRitz(KSP,PetscBool);
124: PETSC_EXTERN PetscErrorCode KSPGetComputeEigenvalues(KSP,PetscBool*);
125: PETSC_EXTERN PetscErrorCode KSPSetComputeSingularValues(KSP,PetscBool);
126: PETSC_EXTERN PetscErrorCode KSPGetComputeSingularValues(KSP,PetscBool*);
127: PETSC_EXTERN PetscErrorCode KSPGetRhs(KSP,Vec*);
128: PETSC_EXTERN PetscErrorCode KSPGetSolution(KSP,Vec*);
129: PETSC_EXTERN PetscErrorCode KSPGetResidualNorm(KSP,PetscReal*);
130: PETSC_EXTERN PetscErrorCode KSPGetIterationNumber(KSP,PetscInt*);
131: PETSC_EXTERN PetscErrorCode KSPGetTotalIterations(KSP,PetscInt*);
132: PETSC_EXTERN PetscErrorCode KSPCreateVecs(KSP,PetscInt,Vec**,PetscInt,Vec**);
133: PETSC_DEPRECATED_FUNCTION("Use KSPCreateVecs() (since version 3.6)") PETSC_STATIC_INLINE PetscErrorCode KSPGetVecs(KSP ksp,PetscInt n,Vec **x,PetscInt m,Vec **y) {return KSPCreateVecs(ksp,n,x,m,y);}

135: PETSC_EXTERN PetscErrorCode KSPSetPreSolve(KSP,PetscErrorCode (*)(KSP,Vec,Vec,void*),void*);
136: PETSC_EXTERN PetscErrorCode KSPSetPostSolve(KSP,PetscErrorCode (*)(KSP,Vec,Vec,void*),void*);

138: PETSC_EXTERN PetscErrorCode KSPSetPC(KSP,PC);
139: PETSC_EXTERN PetscErrorCode KSPGetPC(KSP,PC*);

141: PETSC_EXTERN PetscErrorCode KSPMonitor(KSP,PetscInt,PetscReal);
142: PETSC_EXTERN PetscErrorCode KSPMonitorSet(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscReal,void*),void*,PetscErrorCode (*)(void**));
143: PETSC_EXTERN PetscErrorCode KSPMonitorCancel(KSP);
144: PETSC_EXTERN PetscErrorCode KSPGetMonitorContext(KSP,void**);
145: PETSC_EXTERN PetscErrorCode KSPGetResidualHistory(KSP,const PetscReal*[],PetscInt*);
146: PETSC_EXTERN PetscErrorCode KSPSetResidualHistory(KSP,PetscReal[],PetscInt,PetscBool);
147: PETSC_EXTERN PetscErrorCode KSPGetErrorHistory(KSP,const PetscReal*[],PetscInt*);
148: PETSC_EXTERN PetscErrorCode KSPSetErrorHistory(KSP,PetscReal[],PetscInt,PetscBool);

150: PETSC_EXTERN PetscErrorCode KSPBuildSolutionDefault(KSP,Vec,Vec*);
151: PETSC_EXTERN PetscErrorCode KSPBuildResidualDefault(KSP,Vec,Vec,Vec*);
152: PETSC_EXTERN PetscErrorCode KSPDestroyDefault(KSP);
153: PETSC_EXTERN PetscErrorCode KSPSetWorkVecs(KSP,PetscInt);

155: PETSC_EXTERN PetscErrorCode PCKSPGetKSP(PC,KSP*);
156: PETSC_EXTERN PetscErrorCode PCKSPSetKSP(PC,KSP);
157: PETSC_EXTERN PetscErrorCode PCBJacobiGetSubKSP(PC,PetscInt*,PetscInt*,KSP*[]);
158: PETSC_EXTERN PetscErrorCode PCASMGetSubKSP(PC,PetscInt*,PetscInt*,KSP*[]);
159: PETSC_EXTERN PetscErrorCode PCGASMGetSubKSP(PC,PetscInt*,PetscInt*,KSP*[]);
160: PETSC_EXTERN PetscErrorCode PCFieldSplitGetSubKSP(PC,PetscInt*,KSP*[]);
161: PETSC_EXTERN PetscErrorCode PCFieldSplitSchurGetSubKSP(PC,PetscInt*,KSP*[]);
162: PETSC_EXTERN PetscErrorCode PCMGGetSmoother(PC,PetscInt,KSP*);
163: PETSC_EXTERN PetscErrorCode PCMGGetSmootherDown(PC,PetscInt,KSP*);
164: PETSC_EXTERN PetscErrorCode PCMGGetSmootherUp(PC,PetscInt,KSP*);
165: PETSC_EXTERN PetscErrorCode PCMGGetCoarseSolve(PC,KSP*);
166: PETSC_EXTERN PetscErrorCode PCGalerkinGetKSP(PC,KSP*);
167: PETSC_EXTERN PetscErrorCode PCDeflationGetCoarseKSP(PC,KSP*);
168: /*
169:   PCMGCoarseList contains the list of coarse space constructor currently registered
170:   These are added with PCMGRegisterCoarseSpaceConstructor()
171: */
172: PETSC_EXTERN PetscFunctionList PCMGCoarseList;
173: PETSC_EXTERN PetscErrorCode PCMGRegisterCoarseSpaceConstructor(const char[], PetscErrorCode (*)(PC, PetscInt, DM, KSP, PetscInt, const Vec[], Vec **));
174: PETSC_EXTERN PetscErrorCode PCMGGetCoarseSpaceConstructor(const char[], PetscErrorCode (**)(PC, PetscInt, DM, KSP, PetscInt, const Vec[], Vec **));


177: PETSC_EXTERN PetscErrorCode KSPBuildSolution(KSP,Vec,Vec*);
178: PETSC_EXTERN PetscErrorCode KSPBuildResidual(KSP,Vec,Vec,Vec*);

180: PETSC_EXTERN PetscErrorCode KSPRichardsonSetScale(KSP,PetscReal);
181: PETSC_EXTERN PetscErrorCode KSPRichardsonSetSelfScale(KSP,PetscBool);
182: PETSC_EXTERN PetscErrorCode KSPChebyshevSetEigenvalues(KSP,PetscReal,PetscReal);
183: PETSC_EXTERN PetscErrorCode KSPChebyshevEstEigSet(KSP,PetscReal,PetscReal,PetscReal,PetscReal);
184: PETSC_EXTERN PetscErrorCode KSPChebyshevEstEigSetUseNoisy(KSP,PetscBool);
185: PETSC_EXTERN PetscErrorCode KSPChebyshevEstEigGetKSP(KSP,KSP*);
186: PETSC_EXTERN PetscErrorCode KSPComputeExtremeSingularValues(KSP,PetscReal*,PetscReal*);
187: PETSC_EXTERN PetscErrorCode KSPComputeEigenvalues(KSP,PetscInt,PetscReal[],PetscReal[],PetscInt*);
188: PETSC_EXTERN PetscErrorCode KSPComputeEigenvaluesExplicitly(KSP,PetscInt,PetscReal[],PetscReal[]);
189: PETSC_EXTERN PetscErrorCode KSPComputeRitz(KSP,PetscBool,PetscBool,PetscInt*,Vec[],PetscReal[],PetscReal[]);

191: /*E

193:   KSPFCDTruncationType - Define how stored directions are used to orthogonalize in flexible conjugate directions (FCD) methods

195:   KSP_FCD_TRUNC_TYPE_STANDARD uses all (up to mmax) stored directions
196:   KSP_FCD_TRUNC_TYPE_NOTAY uses the last max(1,mod(i,mmax)) stored directions at iteration i=0,1..

198:    Level: intermediate
199: .seealso : KSPFCG,KSPPIPEFCG,KSPPIPEGCR,KSPFCGSetTruncationType(),KSPFCGGetTruncationType()

201: E*/
202: typedef enum {KSP_FCD_TRUNC_TYPE_STANDARD,KSP_FCD_TRUNC_TYPE_NOTAY} KSPFCDTruncationType;
203: PETSC_EXTERN const char *const KSPFCDTruncationTypes[];

205: PETSC_EXTERN PetscErrorCode KSPFCGSetMmax(KSP,PetscInt);
206: PETSC_EXTERN PetscErrorCode KSPFCGGetMmax(KSP,PetscInt*);
207: PETSC_EXTERN PetscErrorCode KSPFCGSetNprealloc(KSP,PetscInt);
208: PETSC_EXTERN PetscErrorCode KSPFCGGetNprealloc(KSP,PetscInt*);
209: PETSC_EXTERN PetscErrorCode KSPFCGSetTruncationType(KSP,KSPFCDTruncationType);
210: PETSC_EXTERN PetscErrorCode KSPFCGGetTruncationType(KSP,KSPFCDTruncationType*);

212: PETSC_EXTERN PetscErrorCode KSPPIPEFCGSetMmax(KSP,PetscInt);
213: PETSC_EXTERN PetscErrorCode KSPPIPEFCGGetMmax(KSP,PetscInt*);
214: PETSC_EXTERN PetscErrorCode KSPPIPEFCGSetNprealloc(KSP,PetscInt);
215: PETSC_EXTERN PetscErrorCode KSPPIPEFCGGetNprealloc(KSP,PetscInt*);
216: PETSC_EXTERN PetscErrorCode KSPPIPEFCGSetTruncationType(KSP,KSPFCDTruncationType);
217: PETSC_EXTERN PetscErrorCode KSPPIPEFCGGetTruncationType(KSP,KSPFCDTruncationType*);

219: PETSC_EXTERN PetscErrorCode KSPPIPEGCRSetMmax(KSP,PetscInt);
220: PETSC_EXTERN PetscErrorCode KSPPIPEGCRGetMmax(KSP,PetscInt*);
221: PETSC_EXTERN PetscErrorCode KSPPIPEGCRSetNprealloc(KSP,PetscInt);
222: PETSC_EXTERN PetscErrorCode KSPPIPEGCRGetNprealloc(KSP,PetscInt*);
223: PETSC_EXTERN PetscErrorCode KSPPIPEGCRSetTruncationType(KSP,KSPFCDTruncationType);
224: PETSC_EXTERN PetscErrorCode KSPPIPEGCRGetTruncationType(KSP,KSPFCDTruncationType*);
225: PETSC_EXTERN PetscErrorCode KSPPIPEGCRSetUnrollW(KSP,PetscBool);
226: PETSC_EXTERN PetscErrorCode KSPPIPEGCRGetUnrollW(KSP,PetscBool*);

228: PETSC_EXTERN PetscErrorCode KSPGMRESSetRestart(KSP, PetscInt);
229: PETSC_EXTERN PetscErrorCode KSPGMRESGetRestart(KSP, PetscInt*);
230: PETSC_EXTERN PetscErrorCode KSPGMRESSetHapTol(KSP,PetscReal);
231: PETSC_EXTERN PetscErrorCode KSPGMRESSetBreakdownTolerance(KSP,PetscReal);

233: PETSC_EXTERN PetscErrorCode KSPGMRESSetPreAllocateVectors(KSP);
234: PETSC_EXTERN PetscErrorCode KSPGMRESSetOrthogonalization(KSP,PetscErrorCode (*)(KSP,PetscInt));
235: PETSC_EXTERN PetscErrorCode KSPGMRESGetOrthogonalization(KSP,PetscErrorCode (**)(KSP,PetscInt));
236: PETSC_EXTERN PetscErrorCode KSPGMRESModifiedGramSchmidtOrthogonalization(KSP,PetscInt);
237: PETSC_EXTERN PetscErrorCode KSPGMRESClassicalGramSchmidtOrthogonalization(KSP,PetscInt);

239: PETSC_EXTERN PetscErrorCode KSPLGMRESSetAugDim(KSP,PetscInt);
240: PETSC_EXTERN PetscErrorCode KSPLGMRESSetConstant(KSP);

242: PETSC_EXTERN PetscErrorCode KSPPIPEFGMRESSetShift(KSP,PetscScalar);

244: PETSC_EXTERN PetscErrorCode KSPGCRSetRestart(KSP,PetscInt);
245: PETSC_EXTERN PetscErrorCode KSPGCRGetRestart(KSP,PetscInt*);
246: PETSC_EXTERN PetscErrorCode KSPGCRSetModifyPC(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscReal,void*),void*,PetscErrorCode(*)(void*));

248: PETSC_EXTERN PetscErrorCode KSPFETIDPGetInnerBDDC(KSP,PC*);
249: PETSC_EXTERN PetscErrorCode KSPFETIDPSetInnerBDDC(KSP,PC);
250: PETSC_EXTERN PetscErrorCode KSPFETIDPGetInnerKSP(KSP,KSP*);
251: PETSC_EXTERN PetscErrorCode KSPFETIDPSetPressureOperator(KSP,Mat);

253: PETSC_EXTERN PetscErrorCode KSPHPDDMSetDeflationSpace(KSP,Mat);
254: PETSC_EXTERN PetscErrorCode KSPHPDDMGetDeflationSpace(KSP,Mat*);
255: PETSC_DEPRECATED_FUNCTION("Use KSPMatSolve() (since version 3.14)") PETSC_STATIC_INLINE PetscErrorCode KSPHPDDMMatSolve(KSP ksp, Mat B, Mat X) { return KSPMatSolve(ksp, B, X); }
256: /*E
257:     KSPHPDDMType - Type of Krylov method used by KSPHPDDM

259:     Level: intermediate

261:     Values:
262: +   KSP_HPDDM_TYPE_GMRES (default)
263: .   KSP_HPDDM_TYPE_BGMRES
264: .   KSP_HPDDM_TYPE_CG
265: .   KSP_HPDDM_TYPE_BCG
266: .   KSP_HPDDM_TYPE_GCRODR
267: .   KSP_HPDDM_TYPE_BGCRODR
268: .   KSP_HPDDM_TYPE_BFBCG
269: -   KSP_HPDDM_TYPE_PREONLY

271: .seealso: KSPHPDDM, KSPHPDDMSetType()
272: E*/
273: typedef enum {
274:   KSP_HPDDM_TYPE_GMRES = 0,
275:   KSP_HPDDM_TYPE_BGMRES = 1,
276:   KSP_HPDDM_TYPE_CG = 2,
277:   KSP_HPDDM_TYPE_BCG = 3,
278:   KSP_HPDDM_TYPE_GCRODR = 4,
279:   KSP_HPDDM_TYPE_BGCRODR = 5,
280:   KSP_HPDDM_TYPE_BFBCG = 6,
281:   KSP_HPDDM_TYPE_PREONLY = 7
282: } KSPHPDDMType;
283: PETSC_EXTERN const char *const KSPHPDDMTypes[];
284: PETSC_EXTERN PetscErrorCode KSPHPDDMSetType(KSP,KSPHPDDMType);
285: PETSC_EXTERN PetscErrorCode KSPHPDDMGetType(KSP,KSPHPDDMType*);

287: /*E
288:     KSPGMRESCGSRefinementType - How the classical (unmodified) Gram-Schmidt is performed.

290:    Level: advanced

292: .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(),
293:           KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSPGMRESModifiedGramSchmidtOrthogonalization()

295: E*/
296: typedef enum {KSP_GMRES_CGS_REFINE_NEVER, KSP_GMRES_CGS_REFINE_IFNEEDED, KSP_GMRES_CGS_REFINE_ALWAYS} KSPGMRESCGSRefinementType;
297: PETSC_EXTERN const char *const KSPGMRESCGSRefinementTypes[];
298: /*MC
299:     KSP_GMRES_CGS_REFINE_NEVER - Do the classical (unmodified) Gram-Schmidt process

301:    Level: advanced

303:    Note: Possible unstable, but the fastest to compute

305: .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(),
306:           KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSP_GMRES_CGS_REFINE_IFNEEDED, KSP_GMRES_CGS_REFINE_ALWAYS,
307:           KSPGMRESModifiedGramSchmidtOrthogonalization()
308: M*/

310: /*MC
311:     KSP_GMRES_CGS_REFINE_IFNEEDED - Do the classical (unmodified) Gram-Schmidt process and one step of
312:           iterative refinement if an estimate of the orthogonality of the resulting vectors indicates
313:           poor orthogonality.

315:    Level: advanced

317:    Note: This is slower than KSP_GMRES_CGS_REFINE_NEVER because it requires an extra norm computation to
318:      estimate the orthogonality but is more stable.

320: .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(),
321:           KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSP_GMRES_CGS_REFINE_NEVER, KSP_GMRES_CGS_REFINE_ALWAYS,
322:           KSPGMRESModifiedGramSchmidtOrthogonalization()
323: M*/

325: /*MC
326:     KSP_GMRES_CGS_REFINE_NEVER - Do two steps of the classical (unmodified) Gram-Schmidt process.

328:    Level: advanced

330:    Note: This is roughly twice the cost of KSP_GMRES_CGS_REFINE_NEVER because it performs the process twice
331:      but it saves the extra norm calculation needed by KSP_GMRES_CGS_REFINE_IFNEEDED.

333:         You should only use this if you absolutely know that the iterative refinement is needed.

335: .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(),
336:           KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSP_GMRES_CGS_REFINE_IFNEEDED, KSP_GMRES_CGS_REFINE_ALWAYS,
337:           KSPGMRESModifiedGramSchmidtOrthogonalization()
338: M*/

340: PETSC_EXTERN PetscErrorCode KSPGMRESSetCGSRefinementType(KSP,KSPGMRESCGSRefinementType);
341: PETSC_EXTERN PetscErrorCode KSPGMRESGetCGSRefinementType(KSP,KSPGMRESCGSRefinementType*);

343: PETSC_EXTERN PetscErrorCode KSPFGMRESModifyPCNoChange(KSP,PetscInt,PetscInt,PetscReal,void*);
344: PETSC_EXTERN PetscErrorCode KSPFGMRESModifyPCKSP(KSP,PetscInt,PetscInt,PetscReal,void*);
345: PETSC_EXTERN PetscErrorCode KSPFGMRESSetModifyPC(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscInt,PetscReal,void*),void*,PetscErrorCode(*)(void*));

347: PETSC_EXTERN PetscErrorCode KSPQCGSetTrustRegionRadius(KSP,PetscReal);
348: PETSC_EXTERN PetscErrorCode KSPQCGGetQuadratic(KSP,PetscReal*);
349: PETSC_EXTERN PetscErrorCode KSPQCGGetTrialStepNorm(KSP,PetscReal*);

351: PETSC_EXTERN PetscErrorCode KSPBCGSLSetXRes(KSP,PetscReal);
352: PETSC_EXTERN PetscErrorCode KSPBCGSLSetPol(KSP,PetscBool);
353: PETSC_EXTERN PetscErrorCode KSPBCGSLSetEll(KSP,PetscInt);
354: PETSC_EXTERN PetscErrorCode KSPBCGSLSetUsePseudoinverse(KSP,PetscBool);

356: PETSC_EXTERN PetscErrorCode KSPSetFromOptions(KSP);
357: PETSC_EXTERN PetscErrorCode KSPResetFromOptions(KSP);
358: PETSC_EXTERN PetscErrorCode KSPAddOptionsChecker(PetscErrorCode (*)(KSP));

360: PETSC_EXTERN PetscErrorCode KSPMonitorSetFromOptions(KSP,const char[],const char[],void*);
361: PETSC_EXTERN PetscErrorCode KSPMonitorLGCreate(MPI_Comm,const char[],const char[],const char[],PetscInt,const char *[],int,int,int,int,PetscDrawLG *);
362: PETSC_EXTERN PetscErrorCode KSPMonitorResidual(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
363: PETSC_EXTERN PetscErrorCode KSPMonitorResidualDraw(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
364: PETSC_EXTERN PetscErrorCode KSPMonitorResidualDrawLG(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
365: PETSC_EXTERN PetscErrorCode KSPMonitorResidualDrawLGCreate(PetscViewer,PetscViewerFormat,void *,PetscViewerAndFormat **);
366: PETSC_EXTERN PetscErrorCode KSPMonitorResidualShort(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
367: PETSC_EXTERN PetscErrorCode KSPMonitorResidualRange(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
368: PETSC_EXTERN PetscErrorCode KSPMonitorTrueResidual(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
369: PETSC_EXTERN PetscErrorCode KSPMonitorTrueResidualDraw(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
370: PETSC_EXTERN PetscErrorCode KSPMonitorTrueResidualDrawLG(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
371: PETSC_EXTERN PetscErrorCode KSPMonitorTrueResidualDrawLGCreate(PetscViewer,PetscViewerFormat,void *,PetscViewerAndFormat **);
372: PETSC_EXTERN PetscErrorCode KSPMonitorTrueResidualMax(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
373: PETSC_EXTERN PetscErrorCode KSPMonitorError(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
374: PETSC_EXTERN PetscErrorCode KSPMonitorErrorDraw(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
375: PETSC_EXTERN PetscErrorCode KSPMonitorErrorDrawLG(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
376: PETSC_EXTERN PetscErrorCode KSPMonitorErrorDrawLGCreate(PetscViewer,PetscViewerFormat,void *,PetscViewerAndFormat **);
377: PETSC_EXTERN PetscErrorCode KSPMonitorSolution(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
378: PETSC_EXTERN PetscErrorCode KSPMonitorSolutionDraw(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
379: PETSC_EXTERN PetscErrorCode KSPMonitorSolutionDrawLG(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
380: PETSC_EXTERN PetscErrorCode KSPMonitorSolutionDrawLGCreate(PetscViewer,PetscViewerFormat,void *,PetscViewerAndFormat **);
381: PETSC_EXTERN PetscErrorCode KSPMonitorSingularValue(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
382: PETSC_EXTERN PetscErrorCode KSPMonitorSingularValueCreate(PetscViewer,PetscViewerFormat,void *,PetscViewerAndFormat **);
383: PETSC_DEPRECATED_FUNCTION("Use KSPMonitorResidual() (since version 3.15)") PETSC_STATIC_INLINE PetscErrorCode KSPMonitorDefault(KSP ksp, PetscInt n, PetscReal rnorm, PetscViewerAndFormat *vf) {return KSPMonitorResidual(ksp,n,rnorm,vf);}
384: PETSC_DEPRECATED_FUNCTION("Use KSPMonitorTrueResidual() (since version 3.15)") PETSC_STATIC_INLINE PetscErrorCode KSPMonitorTrueResidualNorm(KSP ksp, PetscInt n, PetscReal rnorm, PetscViewerAndFormat *vf) {return KSPMonitorTrueResidual(ksp,n,rnorm,vf);}
385: PETSC_DEPRECATED_FUNCTION("Use KSPMonitorTrueResidualMax() (since version 3.15)") PETSC_STATIC_INLINE PetscErrorCode KSPMonitorTrueResidualMaxNorm(KSP ksp, PetscInt n, PetscReal rnorm, PetscViewerAndFormat *vf) {return KSPMonitorTrueResidualMax(ksp,n,rnorm,vf);}

387: PETSC_EXTERN PetscErrorCode KSPGMRESMonitorKrylov(KSP,PetscInt,PetscReal,void*);
388: PETSC_EXTERN PetscErrorCode KSPMonitorDynamicTolerance(KSP ksp,PetscInt its,PetscReal fnorm,void *dummy);
389: PETSC_EXTERN PetscErrorCode KSPMonitorDynamicToleranceDestroy(void **dummy);
390: PETSC_EXTERN PetscErrorCode KSPMonitorSAWs(KSP,PetscInt,PetscReal,void*);
391: PETSC_EXTERN PetscErrorCode KSPMonitorSAWsCreate(KSP,void**);
392: PETSC_EXTERN PetscErrorCode KSPMonitorSAWsDestroy(void**);

394: PETSC_EXTERN PetscErrorCode KSPUnwindPreconditioner(KSP,Vec,Vec);
395: PETSC_EXTERN PetscErrorCode KSPInitialResidual(KSP,Vec,Vec,Vec,Vec,Vec);

397: PETSC_EXTERN PetscErrorCode KSPSetOperators(KSP,Mat,Mat);
398: PETSC_EXTERN PetscErrorCode KSPGetOperators(KSP,Mat*,Mat*);
399: PETSC_EXTERN PetscErrorCode KSPGetOperatorsSet(KSP,PetscBool*,PetscBool*);
400: PETSC_EXTERN PetscErrorCode KSPSetOptionsPrefix(KSP,const char[]);
401: PETSC_EXTERN PetscErrorCode KSPAppendOptionsPrefix(KSP,const char[]);
402: PETSC_EXTERN PetscErrorCode KSPGetOptionsPrefix(KSP,const char*[]);

404: PETSC_EXTERN PetscErrorCode KSPSetDiagonalScale(KSP,PetscBool);
405: PETSC_EXTERN PetscErrorCode KSPGetDiagonalScale(KSP,PetscBool*);
406: PETSC_EXTERN PetscErrorCode KSPSetDiagonalScaleFix(KSP,PetscBool);
407: PETSC_EXTERN PetscErrorCode KSPGetDiagonalScaleFix(KSP,PetscBool*);

409: PETSC_EXTERN PetscErrorCode KSPView(KSP,PetscViewer);
410: PETSC_EXTERN PetscErrorCode KSPLoad(KSP,PetscViewer);
411: PETSC_EXTERN PetscErrorCode KSPViewFromOptions(KSP,PetscObject,const char[]);
412: PETSC_EXTERN PetscErrorCode KSPConvergedReasonView(KSP,PetscViewer);
413: PETSC_EXTERN PetscErrorCode KSPConvergedReasonViewSet(KSP,PetscErrorCode (*)(KSP,void*),void *vctx,PetscErrorCode (*)(void**));
414: PETSC_EXTERN PetscErrorCode KSPConvergedReasonViewFromOptions(KSP);
415: PETSC_EXTERN PetscErrorCode KSPConvergedReasonViewCancel(KSP);
416: PETSC_EXTERN PetscErrorCode KSPConvergedRateView(KSP,PetscViewer);

418: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedReasonView() (since version 3.14)") PETSC_STATIC_INLINE PetscErrorCode KSPReasonView(KSP ksp,PetscViewer v) {return KSPConvergedReasonView(ksp,v);}
419: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedReasonViewFromOptions() (since version 3.14)") PETSC_STATIC_INLINE PetscErrorCode KSPReasonViewFromOptions(KSP ksp) {return KSPConvergedReasonViewFromOptions(ksp);}

421: #define KSP_FILE_CLASSID 1211223

423: PETSC_EXTERN PetscErrorCode KSPLSQRSetExactMatNorm(KSP,PetscBool);
424: PETSC_EXTERN PetscErrorCode KSPLSQRSetComputeStandardErrorVec(KSP,PetscBool);
425: PETSC_EXTERN PetscErrorCode KSPLSQRGetStandardErrorVec(KSP,Vec*);
426: PETSC_EXTERN PetscErrorCode KSPLSQRGetNorms(KSP,PetscReal*,PetscReal*);
427: PETSC_EXTERN PetscErrorCode KSPLSQRMonitorResidual(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
428: PETSC_EXTERN PetscErrorCode KSPLSQRMonitorResidualDrawLG(KSP,PetscInt,PetscReal,PetscViewerAndFormat*);
429: PETSC_EXTERN PetscErrorCode KSPLSQRMonitorResidualDrawLGCreate(PetscViewer,PetscViewerFormat,void *,PetscViewerAndFormat **);

431: PETSC_EXTERN PetscErrorCode PCRedundantGetKSP(PC,KSP*);
432: PETSC_EXTERN PetscErrorCode PCRedistributeGetKSP(PC,KSP*);
433: PETSC_EXTERN PetscErrorCode PCTelescopeGetKSP(PC,KSP*);

435: /*E
436:     KSPNormType - Norm that is passed in the Krylov convergence
437:        test routines.

439:    Level: advanced

441:    Each solver only supports a subset of these and some may support different ones
442:    depending on left or right preconditioning, see KSPSetPCSide()

444:    Notes:
445:     this must match petsc/finclude/petscksp.h

447: .seealso: KSPSolve(), KSPGetConvergedReason(), KSPSetNormType(),
448:           KSPSetConvergenceTest(), KSPSetPCSide()
449: E*/
450: typedef enum {KSP_NORM_DEFAULT = -1,KSP_NORM_NONE = 0,KSP_NORM_PRECONDITIONED = 1,KSP_NORM_UNPRECONDITIONED = 2,KSP_NORM_NATURAL = 3} KSPNormType;
451: #define KSP_NORM_MAX (KSP_NORM_NATURAL + 1)
452: PETSC_EXTERN const char *const*const KSPNormTypes;

454: /*MC
455:     KSP_NORM_NONE - Do not compute a norm during the Krylov process. This will
456:           possibly save some computation but means the convergence test cannot
457:           be based on a norm of a residual etc.

459:    Level: advanced

461:     Note: Some Krylov methods need to compute a residual norm (such as GMRES) and then this option is ignored

463: .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_PRECONDITIONED, KSP_NORM_UNPRECONDITIONED, KSP_NORM_NATURAL
464: M*/

466: /*MC
467:     KSP_NORM_PRECONDITIONED - Compute the norm of the preconditioned residual B*(b - A*x), if left preconditioning, and pass that to the
468:        convergence test routine.

470:    Level: advanced

472: .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_UNPRECONDITIONED, KSP_NORM_NATURAL, KSPSetConvergenceTest()
473: M*/

475: /*MC
476:     KSP_NORM_UNPRECONDITIONED - Compute the norm of the true residual (b - A*x) and pass that to the
477:        convergence test routine.

479:    Level: advanced

481: .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_PRECONDITIONED, KSP_NORM_NATURAL, KSPSetConvergenceTest()
482: M*/

484: /*MC
485:     KSP_NORM_NATURAL - Compute the 'natural norm' of residual sqrt((b - A*x)*B*(b - A*x)) and pass that to the
486:        convergence test routine. This is only supported by  KSPCG, KSPCR, KSPCGNE, KSPCGS, KSPFCG, KSPPIPEFCG, KSPPIPEGCR

488:    Level: advanced

490: .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_PRECONDITIONED, KSP_NORM_UNPRECONDITIONED, KSPSetConvergenceTest()
491: M*/

493: PETSC_EXTERN PetscErrorCode KSPSetNormType(KSP,KSPNormType);
494: PETSC_EXTERN PetscErrorCode KSPGetNormType(KSP,KSPNormType*);
495: PETSC_EXTERN PetscErrorCode KSPSetSupportedNorm(KSP ksp,KSPNormType,PCSide,PetscInt);
496: PETSC_EXTERN PetscErrorCode KSPSetCheckNormIteration(KSP,PetscInt);
497: PETSC_EXTERN PetscErrorCode KSPSetLagNorm(KSP,PetscBool);

499: #define KSP_DIVERGED_PCSETUP_FAILED_DEPRECATED KSP_DIVERGED_PCSETUP_FAILED PETSC_DEPRECATED_ENUM("Use KSP_DIVERGED_PC_FAILED (since version 3.11)")
500: /*E
501:     KSPConvergedReason - reason a Krylov method was said to have converged or diverged

503:    Level: beginner

505:    Notes:
506:     See KSPGetConvergedReason() for explanation of each value

508:    Developer Notes:
509:     this must match petsc/finclude/petscksp.h

511:       The string versions of these are KSPConvergedReasons; if you change
512:       any of the values here also change them that array of names.

514: .seealso: KSPSolve(), KSPGetConvergedReason(), KSPSetTolerances(), KSPConvergedReasonView()
515: E*/
516: typedef enum {/* converged */
517:               KSP_CONVERGED_RTOL_NORMAL        =  1,
518:               KSP_CONVERGED_ATOL_NORMAL        =  9,
519:               KSP_CONVERGED_RTOL               =  2,
520:               KSP_CONVERGED_ATOL               =  3,
521:               KSP_CONVERGED_ITS                =  4,
522:               KSP_CONVERGED_CG_NEG_CURVE       =  5,
523:               KSP_CONVERGED_CG_CONSTRAINED     =  6,
524:               KSP_CONVERGED_STEP_LENGTH        =  7,
525:               KSP_CONVERGED_HAPPY_BREAKDOWN    =  8,
526:               /* diverged */
527:               KSP_DIVERGED_NULL                = -2,
528:               KSP_DIVERGED_ITS                 = -3,
529:               KSP_DIVERGED_DTOL                = -4,
530:               KSP_DIVERGED_BREAKDOWN           = -5,
531:               KSP_DIVERGED_BREAKDOWN_BICG      = -6,
532:               KSP_DIVERGED_NONSYMMETRIC        = -7,
533:               KSP_DIVERGED_INDEFINITE_PC       = -8,
534:               KSP_DIVERGED_NANORINF            = -9,
535:               KSP_DIVERGED_INDEFINITE_MAT      = -10,
536:               KSP_DIVERGED_PC_FAILED           = -11,
537:               KSP_DIVERGED_PCSETUP_FAILED_DEPRECATED  = -11,

539:               KSP_CONVERGED_ITERATING          =  0} KSPConvergedReason;
540: PETSC_EXTERN const char *const*KSPConvergedReasons;

542: /*MC
543:      KSP_CONVERGED_RTOL - norm(r) <= rtol*norm(b) or rtol*norm(b - A*x_0) if KSPConvergedDefaultSetUIRNorm() was called

545:    Level: beginner

547:    See KSPNormType and KSPSetNormType() for possible norms that may be used. By default
548:        for left preconditioning it is the 2-norm of the preconditioned residual, and the
549:        2-norm of the residual for right preconditioning

551:    See also KSP_CONVERGED_ATOL which may apply before this tolerance.

553: .seealso:  KSP_CONVERGED_ATOL, KSP_DIVERGED_DTOL, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

555: M*/

557: /*MC
558:      KSP_CONVERGED_ATOL - norm(r) <= atol

560:    Level: beginner

562:    See KSPNormType and KSPSetNormType() for possible norms that may be used. By default
563:        for left preconditioning it is the 2-norm of the preconditioned residual, and the
564:        2-norm of the residual for right preconditioning

566:    See also KSP_CONVERGED_RTOL which may apply before this tolerance.

568: .seealso:  KSP_CONVERGED_RTOL, KSP_DIVERGED_DTOL, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

570: M*/

572: /*MC
573:      KSP_DIVERGED_DTOL - norm(r) >= dtol*norm(b)

575:    Level: beginner

577:    See KSPNormType and KSPSetNormType() for possible norms that may be used. By default
578:        for left preconditioning it is the 2-norm of the preconditioned residual, and the
579:        2-norm of the residual for right preconditioning

581:    Level: beginner

583: .seealso:  KSP_CONVERGED_ATOL, KSP_DIVERGED_RTOL, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

585: M*/

587: /*MC
588:      KSP_DIVERGED_ITS - Ran out of iterations before any convergence criteria was
589:       reached

591:    Level: beginner

593: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

595: M*/

597: /*MC
598:      KSP_CONVERGED_ITS - Used by the KSPPREONLY solver after the single iteration of
599:            the preconditioner is applied. Also used when the KSPConvergedSkip() convergence
600:            test routine is set in KSP.

602:    Level: beginner

604: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

606: M*/

608: /*MC
609:      KSP_DIVERGED_BREAKDOWN - A breakdown in the Krylov method was detected so the
610:           method could not continue to enlarge the Krylov space. Could be due to a singular matrix or
611:           preconditioner. In KSPHPDDM, this is also returned when some search directions within a block
612:           are colinear.

614:    Level: beginner

616: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

618: M*/

620: /*MC
621:      KSP_DIVERGED_BREAKDOWN_BICG - A breakdown in the KSPBICG method was detected so the
622:           method could not continue to enlarge the Krylov space.

624:    Level: beginner

626: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

628: M*/

630: /*MC
631:      KSP_DIVERGED_NONSYMMETRIC - It appears the operator or preconditioner is not
632:         symmetric and this Krylov method (KSPCG, KSPMINRES, KSPCR) requires symmetry

634:    Level: beginner

636: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

638: M*/

640: /*MC
641:      KSP_DIVERGED_INDEFINITE_PC - It appears the preconditioner is indefinite (has both
642:         positive and negative eigenvalues) and this Krylov method (KSPCG) requires it to
643:         be positive definite

645:    Level: beginner

647:      Notes:
648:     This can happen with the PCICC preconditioner, use -pc_factor_shift_positive_definite to force
649:   the PCICC preconditioner to generate a positive definite preconditioner

651: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

653: M*/

655: /*MC
656:      KSP_DIVERGED_PC_FAILED - It was not possible to build or use the requested preconditioner. This is usually due to a
657:      zero pivot in a factorization. It can also result from a failure in a subpreconditioner inside a nested preconditioner
658:      such as PCFIELDSPLIT.

660:    Level: beginner

662:     Notes:
663:     Run with -ksp_error_if_not_converged to stop the program when the error is detected and print an error message with details.


666: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

668: M*/

670: /*MC
671:      KSP_CONVERGED_ITERATING - This flag is returned if you call KSPGetConvergedReason()
672:         while the KSPSolve() is still running.

674:    Level: beginner

676: .seealso:  KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

678: M*/

680: PETSC_EXTERN PetscErrorCode KSPSetConvergenceTest(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*),void*,PetscErrorCode (*)(void*));
681: PETSC_EXTERN PetscErrorCode KSPGetConvergenceTest(KSP,PetscErrorCode (**)(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*),void**,PetscErrorCode (**)(void*));
682: PETSC_EXTERN PetscErrorCode KSPGetAndClearConvergenceTest(KSP,PetscErrorCode (**)(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*),void**,PetscErrorCode (**)(void*));
683: PETSC_EXTERN PetscErrorCode KSPGetConvergenceContext(KSP,void**);
684: PETSC_EXTERN PetscErrorCode KSPConvergedDefault(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*);
685: PETSC_EXTERN PetscErrorCode KSPLSQRConvergedDefault(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*);
686: PETSC_EXTERN PetscErrorCode KSPConvergedDefaultDestroy(void*);
687: PETSC_EXTERN PetscErrorCode KSPConvergedDefaultCreate(void**);
688: PETSC_EXTERN PetscErrorCode KSPConvergedDefaultSetUIRNorm(KSP);
689: PETSC_EXTERN PetscErrorCode KSPConvergedDefaultSetUMIRNorm(KSP);
690: PETSC_EXTERN PetscErrorCode KSPConvergedDefaultSetConvergedMaxits(KSP,PetscBool);
691: PETSC_EXTERN PetscErrorCode KSPConvergedSkip(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*);
692: PETSC_EXTERN PetscErrorCode KSPGetConvergedReason(KSP,KSPConvergedReason*);
693: PETSC_EXTERN PetscErrorCode KSPGetConvergedReasonString(KSP,const char**);
694: PETSC_EXTERN PetscErrorCode KSPComputeConvergenceRate(KSP,PetscReal*,PetscReal*,PetscReal*,PetscReal*);

696: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedDefault() (since version 3.5)") PETSC_STATIC_INLINE void KSPDefaultConverged(void) { /* never called */ }
697: #define KSPDefaultConverged (KSPDefaultConverged, KSPConvergedDefault)
698: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedDefaultDestroy() (since version 3.5)") PETSC_STATIC_INLINE void KSPDefaultConvergedDestroy(void) { /* never called */ }
699: #define KSPDefaultConvergedDestroy (KSPDefaultConvergedDestroy, KSPConvergedDefaultDestroy)
700: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedDefaultCreate() (since version 3.5)") PETSC_STATIC_INLINE void KSPDefaultConvergedCreate(void) { /* never called */ }
701: #define KSPDefaultConvergedCreate (KSPDefaultConvergedCreate, KSPConvergedDefaultCreate)
702: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedDefaultSetUIRNorm() (since version 3.5)") PETSC_STATIC_INLINE void KSPDefaultConvergedSetUIRNorm(void) { /* never called */ }
703: #define KSPDefaultConvergedSetUIRNorm (KSPDefaultConvergedSetUIRNorm, KSPConvergedDefaultSetUIRNorm)
704: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedDefaultSetUMIRNorm() (since version 3.5)") PETSC_STATIC_INLINE void KSPDefaultConvergedSetUMIRNorm(void) { /* never called */ }
705: #define KSPDefaultConvergedSetUMIRNorm (KSPDefaultConvergedSetUMIRNorm, KSPConvergedDefaultSetUMIRNorm)
706: PETSC_DEPRECATED_FUNCTION("Use KSPConvergedSkip() (since version 3.5)") PETSC_STATIC_INLINE void KSPSkipConverged(void) { /* never called */ }
707: #define KSPSkipConverged (KSPSkipConverged, KSPConvergedSkip)

709: PETSC_EXTERN PetscErrorCode KSPComputeOperator(KSP,MatType,Mat*);
710: PETSC_DEPRECATED_FUNCTION("Use KSPComputeOperator() (since version 3.12)") PETSC_STATIC_INLINE PetscErrorCode KSPComputeExplicitOperator(KSP A,Mat* B) { return KSPComputeOperator(A,NULL,B); }

712: /*E
713:     KSPCGType - Determines what type of CG to use

715:    Level: beginner

717: .seealso: KSPCGSetType()
718: E*/
719: typedef enum {KSP_CG_SYMMETRIC=0,KSP_CG_HERMITIAN=1} KSPCGType;
720: PETSC_EXTERN const char *const KSPCGTypes[];

722: PETSC_EXTERN PetscErrorCode KSPCGSetType(KSP,KSPCGType);
723: PETSC_EXTERN PetscErrorCode KSPCGUseSingleReduction(KSP,PetscBool);

725: PETSC_EXTERN PetscErrorCode KSPCGSetRadius(KSP,PetscReal);
726: PETSC_EXTERN PetscErrorCode KSPCGGetNormD(KSP,PetscReal*);
727: PETSC_EXTERN PetscErrorCode KSPCGGetObjFcn(KSP,PetscReal*);

729: PETSC_EXTERN PetscErrorCode KSPGLTRGetMinEig(KSP,PetscReal*);
730: PETSC_EXTERN PetscErrorCode KSPGLTRGetLambda(KSP,PetscReal*);
731: PETSC_DEPRECATED_FUNCTION("Use KSPGLTRGetMinEig (since v3.12)") PETSC_STATIC_INLINE PetscErrorCode KSPCGGLTRGetMinEig(KSP ksp,PetscReal *x) {return KSPGLTRGetMinEig(ksp,x);}
732: PETSC_DEPRECATED_FUNCTION("Use KSPGLTRGetLambda (since v3.12)") PETSC_STATIC_INLINE PetscErrorCode KSPCGGLTRGetLambda(KSP ksp,PetscReal *x) {return KSPGLTRGetLambda(ksp,x);}

734: PETSC_EXTERN PetscErrorCode KSPPythonSetType(KSP,const char[]);

736: PETSC_EXTERN PetscErrorCode PCPreSolve(PC,KSP);
737: PETSC_EXTERN PetscErrorCode PCPostSolve(PC,KSP);

739: #include <petscdrawtypes.h>
740: PETSC_EXTERN PetscErrorCode KSPMonitorLGRange(KSP,PetscInt,PetscReal,void*);

742: PETSC_EXTERN PetscErrorCode PCShellSetPreSolve(PC,PetscErrorCode (*)(PC,KSP,Vec,Vec));
743: PETSC_EXTERN PetscErrorCode PCShellSetPostSolve(PC,PetscErrorCode (*)(PC,KSP,Vec,Vec));

745: /*S
746:      KSPGuess - Abstract PETSc object that manages all initial guess methods in Krylov methods.

748:    Level: beginner

750: .seealso:  KSPCreate(), KSPSetGuessType(), KSPGuessType
751: S*/
752: typedef struct _p_KSPGuess* KSPGuess;
753: /*J
754:     KSPGuessType - String with the name of a PETSc initial guess for Krylov methods.

756:    Level: beginner

758: .seealso: KSPGuess
759: J*/
760: typedef const char* KSPGuessType;
761: #define KSPGUESSFISCHER "fischer"
762: #define KSPGUESSPOD     "pod"
763: PETSC_EXTERN PetscErrorCode KSPGuessRegister(const char[],PetscErrorCode (*)(KSPGuess));
764: PETSC_EXTERN PetscErrorCode KSPSetGuess(KSP,KSPGuess);
765: PETSC_EXTERN PetscErrorCode KSPGetGuess(KSP,KSPGuess*);
766: PETSC_EXTERN PetscErrorCode KSPGuessView(KSPGuess,PetscViewer);
767: PETSC_EXTERN PetscErrorCode KSPGuessDestroy(KSPGuess*);
768: PETSC_EXTERN PetscErrorCode KSPGuessCreate(MPI_Comm,KSPGuess*);
769: PETSC_EXTERN PetscErrorCode KSPGuessSetType(KSPGuess,KSPGuessType);
770: PETSC_EXTERN PetscErrorCode KSPGuessGetType(KSPGuess,KSPGuessType*);
771: PETSC_EXTERN PetscErrorCode KSPGuessSetUp(KSPGuess);
772: PETSC_EXTERN PetscErrorCode KSPGuessUpdate(KSPGuess,Vec,Vec);
773: PETSC_EXTERN PetscErrorCode KSPGuessFormGuess(KSPGuess,Vec,Vec);
774: PETSC_EXTERN PetscErrorCode KSPGuessSetFromOptions(KSPGuess);
775: PETSC_EXTERN PetscErrorCode KSPGuessFischerSetModel(KSPGuess,PetscInt,PetscInt);
776: PETSC_EXTERN PetscErrorCode KSPSetUseFischerGuess(KSP,PetscInt,PetscInt);
777: PETSC_EXTERN PetscErrorCode KSPSetInitialGuessKnoll(KSP,PetscBool);
778: PETSC_EXTERN PetscErrorCode KSPGetInitialGuessKnoll(KSP,PetscBool*);

780: /*E
781:     MatSchurComplementAinvType - Determines how to approximate the inverse of the (0,0) block in Schur complement preconditioning matrix assembly routines

783:     Level: intermediate

785: .seealso: MatSchurComplementGetAinvType(), MatSchurComplementSetAinvType(), MatSchurComplementGetPmat(), MatGetSchurComplement(), MatCreateSchurComplementPmat()
786: E*/
787: typedef enum {MAT_SCHUR_COMPLEMENT_AINV_DIAG, MAT_SCHUR_COMPLEMENT_AINV_LUMP, MAT_SCHUR_COMPLEMENT_AINV_BLOCK_DIAG} MatSchurComplementAinvType;
788: PETSC_EXTERN const char *const MatSchurComplementAinvTypes[];

790: typedef enum {MAT_LMVM_SYMBROYDEN_SCALE_NONE       = 0,
791:               MAT_LMVM_SYMBROYDEN_SCALE_SCALAR     = 1,
792:               MAT_LMVM_SYMBROYDEN_SCALE_DIAGONAL   = 2,
793:               MAT_LMVM_SYMBROYDEN_SCALE_USER       = 3} MatLMVMSymBroydenScaleType;
794: PETSC_EXTERN const char *const MatLMVMSymBroydenScaleTypes[];

796: PETSC_EXTERN PetscErrorCode MatCreateSchurComplement(Mat,Mat,Mat,Mat,Mat,Mat*);
797: PETSC_EXTERN PetscErrorCode MatSchurComplementGetKSP(Mat,KSP*);
798: PETSC_EXTERN PetscErrorCode MatSchurComplementSetKSP(Mat,KSP);
799: PETSC_EXTERN PetscErrorCode MatSchurComplementSetSubMatrices(Mat,Mat,Mat,Mat,Mat,Mat);
800: PETSC_EXTERN PetscErrorCode MatSchurComplementUpdateSubMatrices(Mat,Mat,Mat,Mat,Mat,Mat);
801: PETSC_EXTERN PetscErrorCode MatSchurComplementGetSubMatrices(Mat,Mat*,Mat*,Mat*,Mat*,Mat*);
802: PETSC_EXTERN PetscErrorCode MatSchurComplementSetAinvType(Mat,MatSchurComplementAinvType);
803: PETSC_EXTERN PetscErrorCode MatSchurComplementGetAinvType(Mat,MatSchurComplementAinvType*);
804: PETSC_EXTERN PetscErrorCode MatSchurComplementGetPmat(Mat,MatReuse,Mat*);
805: PETSC_EXTERN PetscErrorCode MatSchurComplementComputeExplicitOperator(Mat,Mat*);
806: PETSC_EXTERN PetscErrorCode MatGetSchurComplement(Mat,IS,IS,IS,IS,MatReuse,Mat*,MatSchurComplementAinvType,MatReuse,Mat*);
807: PETSC_EXTERN PetscErrorCode MatCreateSchurComplementPmat(Mat,Mat,Mat,Mat,MatSchurComplementAinvType,MatReuse,Mat*);

809: PETSC_EXTERN PetscErrorCode MatCreateLMVMDFP(MPI_Comm,PetscInt,PetscInt,Mat*);
810: PETSC_EXTERN PetscErrorCode MatCreateLMVMBFGS(MPI_Comm,PetscInt,PetscInt,Mat*);
811: PETSC_EXTERN PetscErrorCode MatCreateLMVMSR1(MPI_Comm,PetscInt,PetscInt,Mat*);
812: PETSC_EXTERN PetscErrorCode MatCreateLMVMBroyden(MPI_Comm,PetscInt,PetscInt,Mat*);
813: PETSC_EXTERN PetscErrorCode MatCreateLMVMBadBroyden(MPI_Comm,PetscInt,PetscInt,Mat*);
814: PETSC_EXTERN PetscErrorCode MatCreateLMVMSymBroyden(MPI_Comm,PetscInt,PetscInt,Mat*);
815: PETSC_EXTERN PetscErrorCode MatCreateLMVMSymBadBroyden(MPI_Comm,PetscInt,PetscInt,Mat*);
816: PETSC_EXTERN PetscErrorCode MatCreateLMVMDiagBroyden(MPI_Comm,PetscInt,PetscInt,Mat*);

818: PETSC_EXTERN PetscErrorCode MatLMVMUpdate(Mat, Vec, Vec);
819: PETSC_EXTERN PetscErrorCode MatLMVMIsAllocated(Mat, PetscBool*);
820: PETSC_EXTERN PetscErrorCode MatLMVMAllocate(Mat, Vec, Vec);
821: PETSC_EXTERN PetscErrorCode MatLMVMReset(Mat, PetscBool);
822: PETSC_EXTERN PetscErrorCode MatLMVMResetShift(Mat);
823: PETSC_EXTERN PetscErrorCode MatLMVMClearJ0(Mat);
824: PETSC_EXTERN PetscErrorCode MatLMVMSetJ0(Mat, Mat);
825: PETSC_EXTERN PetscErrorCode MatLMVMSetJ0Scale(Mat, PetscReal);
826: PETSC_EXTERN PetscErrorCode MatLMVMSetJ0Diag(Mat, Vec);
827: PETSC_EXTERN PetscErrorCode MatLMVMSetJ0PC(Mat, PC);
828: PETSC_EXTERN PetscErrorCode MatLMVMSetJ0KSP(Mat, KSP);
829: PETSC_EXTERN PetscErrorCode MatLMVMApplyJ0Fwd(Mat, Vec, Vec);
830: PETSC_EXTERN PetscErrorCode MatLMVMApplyJ0Inv(Mat, Vec, Vec);
831: PETSC_EXTERN PetscErrorCode MatLMVMGetJ0(Mat, Mat*);
832: PETSC_EXTERN PetscErrorCode MatLMVMGetJ0PC(Mat, PC*);
833: PETSC_EXTERN PetscErrorCode MatLMVMGetJ0KSP(Mat, KSP*);
834: PETSC_EXTERN PetscErrorCode MatLMVMSetHistorySize(Mat, PetscInt);
835: PETSC_EXTERN PetscErrorCode MatLMVMGetUpdateCount(Mat, PetscInt*);
836: PETSC_EXTERN PetscErrorCode MatLMVMGetRejectCount(Mat, PetscInt*);
837: PETSC_EXTERN PetscErrorCode MatLMVMSymBroydenSetDelta(Mat, PetscScalar);
838: PETSC_EXTERN PetscErrorCode MatLMVMSymBroydenSetScaleType(Mat, MatLMVMSymBroydenScaleType);

840: PETSC_EXTERN PetscErrorCode KSPSetDM(KSP,DM);
841: PETSC_EXTERN PetscErrorCode KSPSetDMActive(KSP,PetscBool);
842: PETSC_EXTERN PetscErrorCode KSPGetDM(KSP,DM*);
843: PETSC_EXTERN PetscErrorCode KSPSetApplicationContext(KSP,void*);
844: PETSC_EXTERN PetscErrorCode KSPGetApplicationContext(KSP,void*);
845: PETSC_EXTERN PetscErrorCode KSPSetComputeRHS(KSP,PetscErrorCode (*func)(KSP,Vec,void*),void*);
846: PETSC_EXTERN PetscErrorCode KSPSetComputeOperators(KSP,PetscErrorCode(*)(KSP,Mat,Mat,void*),void*);
847: PETSC_EXTERN PetscErrorCode KSPSetComputeInitialGuess(KSP,PetscErrorCode(*)(KSP,Vec,void*),void*);
848: PETSC_EXTERN PetscErrorCode DMKSPSetComputeOperators(DM,PetscErrorCode(*)(KSP,Mat,Mat,void*),void*);
849: PETSC_EXTERN PetscErrorCode DMKSPGetComputeOperators(DM,PetscErrorCode(**)(KSP,Mat,Mat,void*),void*);
850: PETSC_EXTERN PetscErrorCode DMKSPSetComputeRHS(DM,PetscErrorCode(*)(KSP,Vec,void*),void*);
851: PETSC_EXTERN PetscErrorCode DMKSPGetComputeRHS(DM,PetscErrorCode(**)(KSP,Vec,void*),void*);
852: PETSC_EXTERN PetscErrorCode DMKSPSetComputeInitialGuess(DM,PetscErrorCode(*)(KSP,Vec,void*),void*);
853: PETSC_EXTERN PetscErrorCode DMKSPGetComputeInitialGuess(DM,PetscErrorCode(**)(KSP,Vec,void*),void*);

855: PETSC_EXTERN PetscErrorCode DMGlobalToLocalSolve(DM,Vec,Vec);
856: PETSC_EXTERN PetscErrorCode DMProjectField(DM, PetscReal, Vec,
857:                                            void (**)(PetscInt, PetscInt, PetscInt,
858:                                                      const PetscInt[], const PetscInt[], const PetscScalar[], const PetscScalar[], const PetscScalar[],
859:                                                      const PetscInt[], const PetscInt[], const PetscScalar[], const PetscScalar[], const PetscScalar[],
860:                                                      PetscReal, const PetscReal [], PetscInt, const PetscScalar[], PetscScalar []), InsertMode, Vec);


863: PETSC_EXTERN PetscErrorCode DMAdaptInterpolator(DM, DM, Mat, KSP, PetscInt, Vec[], Vec[], Mat *, void *);
864: PETSC_EXTERN PetscErrorCode DMCheckInterpolator(DM, Mat, PetscInt, Vec[], Vec[], PetscReal);
865: #endif