SNESLINESEARCHCP#
Critical point line search. This line search assumes that there exists some artificial \(G(x)\) for which the SNESFunction \( F(x) = grad G(x)\).  Therefore, this line search seeks to find roots of \( F^T Y\) via a secant method.
Options Database Keys#
- -snes_linesearch_minlambda - - the minimum acceptable lambda
- -snes_linesearch_maxstep - - the algorithm insures that a step length is never longer than this value
- -snes_linesearch_damping - - initial trial step length is scaled by this factor on entry to the line search, default is 1.0
- -snes_linesearch_max_it <max_it> - the maximum number of secant steps performed. 
Notes#
This method does NOT use the objective function if it is provided with SNESSetObjective().
This method is the preferred line search for SNESQN and SNESNCG.
See Also#
SNES: Nonlinear Solvers, SNESLineSearch, SNESLineSearchType, SNESLineSearchCreate(), SNESLineSearchSetType()
Level#
advanced
Location#
src/snes/linesearch/impls/cp/linesearchcp.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages