petsc-master 2018-06-18
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SNESNEWTONTR

Newton based nonlinear solver that uses a trust region

Options Database

-snes_trtol <tol> - trust region tolerance
-snes_tr_mu <mu> - trust region parameter
-snes_tr_eta <eta> - trust region parameter
-snes_tr_sigma <sigma> - trust region parameter
-snes_tr_delta0 <delta0> - initial size of the trust region is delta0*norm2(x)
-snes_tr_delta1 <delta1> - trust region parameter
-snes_tr_delta2 <delta2> - trust region parameter
-snes_tr_delta3 <delta3> - trust region parameter

The basic algorithm is taken from "The Minpack Project", by More', Sorensen, Garbow, Hillstrom, pages 88-111 of "Sources and Development of Mathematical Software", Wayne Cowell, editor.

See Also

SNESCreate(), SNES, SNESSetType(), SNESNEWTONLS, SNESSetTrustRegionTolerance()

Level

intermediate

Location

src/snes/impls/tr/tr.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages