SNESLineSearchType#
String with the name of a PETSc line search method SNESLineSearch. Provides all the linesearches for the nonlinear solvers, SNES, in PETSc.
Synopsis#
typedef const char *SNESLineSearchType;
#define SNESLINESEARCHBT "bt"
#define SNESLINESEARCHNLEQERR "nleqerr"
#define SNESLINESEARCHBASIC "basic"
#define SNESLINESEARCHNONE "none"
#define SNESLINESEARCHL2 "l2"
#define SNESLINESEARCHCP "cp"
#define SNESLINESEARCHSHELL "shell"
#define SNESLINESEARCHNCGLINEAR "ncglinear"
#define SNESLINESEARCHBISECTION "bisection"
Values#
SNESLINESEARCHBASIC- (or equivalentlySNESLINESEARCHNONE) Simple damping line search, defaults to using the full Newton stepSNESLINESEARCHBT- Backtracking line search over the L2 norm of the functionSNESLINESEARCHL2- Secant line search over the L2 norm of the functionSNESLINESEARCHCP- Critical point secant line search assuming \(F(x) = \nabla G(x)\) for some unknown \(G(x)\)SNESLINESEARCHNLEQERR- Affine-covariant error-oriented linesearchSNESLINESEARCHSHELL- User providedSNESLineSearchimplementation
Note#
Use SNESLineSearchSetType() or the options database key -snes_linesearch_type to set
the specific line search algorithm to use with a given SNES object. Not all SNESType can utilize a line search.
See Also#
SNES: Nonlinear Solvers, SNESLineSearch, SNESLineSearchSetType(), SNES
Level#
beginner
Location#
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages