JacActionCtx

Application context used by matrix-free DMPLEX examples to compute the action of a Jacobian at a fixed base state on a vector

Synopsis

typedef struct {
  DM    dm;
  Vec   u; /* The base vector for the Jacobian action J(u) x */
  Mat   J; /* Preconditioner for testing */
  void *user;
} JacActionCtx;

Note

Holds the DM defining the discretization, the base state vector u at which the Jacobian is linearized, an optional assembled J used as a preconditioner or for testing, and a pointer to the user’s own application context. Created and consumed by example codes rather than the core PETSc library.

See Also

DMPLEX, Mat, MATSHELL, DMPlexComputeJacobianActionByKey()

Level

developer

Location

include/petscdmplex.h

Examples

src/snes/tutorials/ex12.c

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