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"
Values#
- SNESLINESEARCHBASIC- (or equivalently- SNESLINESEARCHNONE) Simple damping line search, defaults to using the full Newton step
- SNESLINESEARCHBT- Backtracking line search over the L2 norm of the function
- SNESLINESEARCHL2- Secant line search over the L2 norm of the function
- SNESLINESEARCHCP- Critical point secant line search assuming \(F(x) = \nabla G(x)\) for some unknown \(G(x)\)
- SNESLINESEARCHNLEQERR- Affine-covariant error-oriented linesearch
- SNESLINESEARCHSHELL- User provided- SNESLineSearchimplementation
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