petsc-master 2020-10-18
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SNESMSRegister

register a multistage scheme

Synopsis

#include "petscsnes.h" 
PetscErrorCode SNESMSRegister(SNESMSType name,PetscInt nstages,PetscInt nregisters,PetscReal stability,const PetscReal gamma[],const PetscReal delta[],const PetscReal betasub[])
Not Collective, but the same schemes should be registered on all processes on which they will be used

Input Parameters

name - identifier for method
nstages - number of stages
nregisters - number of registers used by low-storage implementation
stability - scaled stability region
gamma - coefficients, see Ketcheson's paper
delta - coefficients, see Ketcheson's paper
betasub - subdiagonal of Shu-Osher form

Notes

The notation is described in Ketcheson (2010) Runge-Kutta methods with minimum storage implementations.

Many multistage schemes are of the form $ X_0 = X^{(n)} $ X_k = X_0 + \alpha_k * F(X_{k-1}), k = 1,\ldots,s $ X^{(n+1)} = X_s These methods can be registered with

   SNESMSRegister("name",s,1,stability,NULL,NULL,alpha);

See Also

SNESMS

Level

advanced

Location

src/snes/impls/ms/ms.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages