petsc-3.10.5 2019-03-28
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# SNESComputeNGS

Calls the Gauss-Seidel function that has been set with SNESSetNGS().

### Synopsis

    #include "petscsnes.h"
    PetscErrorCode  SNESComputeNGS(SNES snes,Vec b,Vec x)

Collective on SNES

### Input Parameters

| snes | - the SNES context
| x | - input vector
| b | - rhs vector

### Output Parameter

x -new solution vector

### Notes

SNESComputeNGS() is typically used within composed nonlinear solver implementations, so most users would not generally call this routine themselves.

### Keywords

SNES, nonlinear, compute, function

### See Also

SNESSetNGS(), SNESComputeFunction()

### Level

developer

### Location

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