SNESQuadraticLineSearch

Performs a quadratic line search.

Synopsis

int SNESQuadraticLineSearch(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 - the SNES 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
y - new iterate (contains search direction on input)
gnorm - 2-norm of g
ynorm - 2-norm of search length
flag - 0 if line search succeeds; -1 on failure.

Options Database Key

-snes_eq_ls quadratic -Activates SNESQuadraticLineSearch()

Notes

Use SNESSetLineSearch() to set this routine within the SNES_EQ_LS method.

Keywords

SNES, nonlinear, quadratic, line search

See Also

SNESCubicLineSearch(), SNESNoLineSearch(), SNESSetLineSearch()

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