petsc-3.10.5 2019-03-28
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# SNESLineSearchGetNorms

Gets the norms for for X, Y, and F.

### Synopsis

    #include "petscsnes.h"
    PetscErrorCode  SNESLineSearchGetNorms(SNESLineSearch linesearch, PetscReal * xnorm, PetscReal * fnorm, PetscReal * ynorm)

### Input Parameters

linesearch -linesearch context

### Output Parameters

| xnorm | - The norm of the current solution
| fnorm | - The norm of the current function
| ynorm | - The norm of the current update

### Notes

This function is mainly called from SNES implementations.

### See Also

SNESLineSearchSetNorms() SNESLineSearchGetVecs()

### Level

developer

### Location

src/snes/linesearch/interface/linesearch.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages