slepc-main 2024-12-17

MFNSetDimensions

Sets the dimension of the subspace to be used by the solver.

#include "slepcmfn.h" 
PetscErrorCode MFNSetDimensions(MFN mfn,PetscInt ncv)

Logically Collective

	mfn	- the matrix function context
	ncv	- the maximum dimension of the subspace to be used by the solver

-mfn_ncv <ncv>

- Sets the dimension of the subspace

Use PETSC_DETERMINE for ncv to assign a reasonably good value, which is dependent on the solution method.

intermediate