petsc-3.11.4 2019-09-28

KSPGuessFischerSetModel

Use the Paul Fischer algorithm

#include "petscksp.h" 
PetscErrorCode  KSPGuessFischerSetModel(KSPGuess guess,PetscInt model,PetscInt size)

Logically Collective on KSP

	guess	- the initial guess context
	model	- use model 1, model 2 or any other number to turn it off
	size	- size of subspace used to generate initial guess

-ksp_guess_fischer_model <model,size> -uses the Fischer initial guess generator for repeated linear solves

set, options, prefix, database

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