petsc-3.14.6 2021-03-30
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TAOCG

 Nonlinear conjugate gradient method is an extension of the nonlinear conjugate gradient solver for nonlinear optimization.

Options Database Keys

-tao_cg_eta <r> - restart tolerance
-tao_cg_type <taocg_type> - cg formula
-tao_cg_delta_min <r> - minimum delta value
-tao_cg_delta_max <r> - maximum delta value

Notes

CG formulas are

"fr" - Fletcher-Reeves "pr" - Polak-Ribiere "prp" - Polak-Ribiere-Plus "hs" - Hestenes-Steifel "dy" - Dai-Yuan

Level

beginner

Location

src/tao/unconstrained/impls/cg/taocg.c

Examples

src/tao/unconstrained/tutorials/eptorsion2.c.html
src/tao/unconstrained/tutorials/minsurf2.c.html
src/tao/unconstrained/tutorials/eptorsion2f.F.html

Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages