MatSNESMFCheckPositivity

 Checks that all entries in U + h*a are positive or zero, decreases h until this is satisfied.

Synopsis

#include "petscsnes.h"   
int MatSNESMFCheckPositivity(Vec U,Vec a,PetscScalar *h,void *dummy)
Collective on Vec

Input Parameters

U - base vector that is added to
a - vector that is added
h - scaling factor on a
dummy - context variable (unused)

Options Database Keys

-snes_mf_check_positivity -

Notes: This is rarely used directly, rather it is passed as an argument to MatSNESMFSetCheckh()

See Also

MatSNESMFSetCheckh()

Level:advanced
Location:src/snes/mf/snesmfj.c
Index of all SNESMF routines
Table of Contents for all manual pages
Index of all manual pages