SNESNoLineSearchNoNorms

This routine is not a line search at all; it simply uses the full Newton step. This version does not even compute the norm of the function or search direction; this is intended only when you know the full step is fine and are not checking for convergence of the nonlinear iteration (for example, you are running always for a fixed number of Newton steps).

Synopsis

int SNESNoLineSearchNoNorms(SNES snes, Vec x, Vec f, Vec g, Vec y, Vec w,
                     double fnorm, double *ynorm, double *gnorm,int *flag )
Collective on SNES and Vec

Input Parameters

snes - nonlinear context
x - current iterate
f - residual evaluated at x
y - search direction (contains new iterate on output)
w - work vector
fnorm - 2-norm of f

Output Parameters

g - residual evaluated at new iterate y
gnorm - not changed
ynorm - not changed
flag - set to 0, indicating a successful line search

Options Database Key

-snes_eq_ls basicnonorms -Activates SNESNoLineSearchNoNorms()

Keywords

SNES, nonlinear, line search, cubic

See Also

SNESCubicLineSearch(), SNESQuadraticLineSearch(),
SNESSetLineSearch(), SNESNoLineSearch()

Location: src/snes/impls/ls/ls.c
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