petsc-3.14.6 2021-03-30

KSPSetComputeRHS

set routine to compute the right hand side of the linear system

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode KSPSetComputeRHS(KSP ksp,PetscErrorCode (*func)(KSP,Vec,void*),void *ctx)

Logically Collective

	ksp	- the KSP context
	func	- function to compute the right hand side
	ctx	- optional context

 func(KSP ksp,Vec b,void *ctx)

	ksp	- the KSP context
	b	- right hand side of linear system
	ctx	- optional user-provided context

The routine you provide will be called EACH you call KSPSolve() to prepare the new right hand side for that solve

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