SNESLINESEARCHBASIC#
This line search implementation is not a line search at all; it simply uses the full step.  Thus, this routine is intended for methods with well-scaled updates; i.e. Newton’s method (SNESNEWTONLS), on well-behaved problems. Also named as SNESLINESEARCHNONE
Options Database Keys#
- -snes_linesearch_damping - - search vector is scaled by this amount on entry to the line search, default is 1.0
- -snes_linesearch_norms - - whether to compute norms or not, default is true (- SNESLineSearchSetComputeNorms())
Note#
For methods with ill-scaled updates (SNESNRICHARDSON, SNESNCG), a small
damping parameter may yield satisfactory, but slow convergence, despite
the lack of the line search.
See Also#
SNES: Nonlinear Solvers, SNES, SNESLineSearch, SNESLineSearchType, SNESGetLineSearch(), SNESLineSearchCreate(), SNESLineSearchSetType(), SNESLineSearchSetDamping(), SNESLineSearchSetComputeNorms()
Level#
advanced
Location#
Examples#
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages