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 dot(F, 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, 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