SNES_KSP_SetConvergenceTestEW

Sets alternative convergence test for the linear solvers within an inexact Newton method.

Synopsis

#include "petscsnes.h"   
int SNES_KSP_SetConvergenceTestEW(SNES snes)

Collective on SNES

Input Parameter

snes -SNES context

Notes

Currently, the default is to use a constant relative tolerance for the inner linear solvers. Alternatively, one can use the Eisenstat-Walker method, where the relative convergence tolerance is reset at each Newton iteration according progress of the nonlinear solver.

Reference

S. C. Eisenstat and H. F. Walker, "Choosing the forcing terms in an inexact Newton method", SISC 17 (1), pp.16-32, 1996.

Keywords

SNES, KSP, Eisenstat, Walker, convergence, test, inexact, Newton

Level:advanced
Location:src/snes/interface/snesut.c
Index of all SNES routines
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Index of all manual pages