SNESLINESEARCHNLEQERR

Error-oriented affine-covariant globalised Newton algorithm of Deuflhard (2011). This linesearch is intended for Newton-type methods which are affine covariant. Affine covariance means that Newton’s method will give the same iterations for F(x) = 0 and AF(x) = 0 for a nonsingular matrix A. This is a fundamental property; the philosophy of this linesearch is that globalisations of Newton’s method should carefully preserve it.

Options Database Keys

• -snes_linesearch_damping<1.0> - initial step length

• -snes_linesearch_minlambda<1e- 12> - minimum step length allowed

Note

Contributed by Patrick Farrell patrick.farrell@maths.ox.ac.uk

Reference

• - * - Newton Methods for Nonlinear Problems, Deuflhard, P. 2011, Springer-Verlag, page 148

See Also

SNESLineSearch, SNES, SNESLineSearchCreate(), SNESLineSearchSetType()

Level

advanced

Location

src/snes/linesearch/impls/nleqerr/linesearchnleqerr.c

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