petsc-3.8.3 2017-12-09
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Laplacian, 2d
ex13.c
Solves a variable Poisson problem with KSP.
ex13f90.F90
ex16.c
Solves a sequence of linear systems with different right-hand-side vectors.
Input parameters include:
-ntimes <ntimes> : number of linear systems to solve
-view_exact_sol : write exact solution vector to stdout
-m <mesh_x> : number of mesh points in x-direction
-n <mesh_n> : number of mesh points in y-direction
ex18.c
ex2.c
Solves a linear system in parallel with KSP.
Input parameters include:
-random_exact_sol : use a random exact solution vector
-view_exact_sol : write exact solution vector to stdout
-m <mesh_x> : number of mesh points in x-direction
-n <mesh_n> : number of mesh points in y-direction
ex46.c
Solves a linear system in parallel with KSP and DM.
Compare this to ex2 which solves the same problem without a DM.