PETSc version 3.17.4
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# DMSNESCheckResidual

Check the residual of the exact solution

### Synopsis

    #include "petscdmplex.h"
    #include "petscsnes.h"
    PetscErrorCode DMSNESCheckResidual(SNES snes, DM dm, Vec u, PetscReal tol, PetscReal *residual)

### Input Parameters

| snes | - the SNES object
| dm | - the DM
| u | - a DM vector
| tol | - A tolerance for the check, or -1 to print the results instead

### Output Parameters

| residual | - The residual norm of the exact solution, or NULL

### See Also

DNSNESCheckFromOptions(), DMSNESCheckDiscretization(), DMSNESCheckJacobian()

### Level

developer

### Location

src/snes/utils/dmplexsnes.c
Index of all SNES routines
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Index of all manual pages