SNESLINESEARCHNLEQERR#

Error-oriented affine-covariant globalised Newton algorithm of Deuflhard [Deu11] 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 any 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

References#

Deu11

Peter Deuflhard. Newton Methods for Nonlinear Problems. Volume 35. Springer-Verlag, Berlin, Heidelberg, 2011. ISBN 978-3-642-23898-7. doi:10.1007/978-3-642-23899-4.

See Also#

SNES: Nonlinear Solvers, SNESLineSearch, SNES, SNESLineSearchCreate(), SNESLineSearchSetType()

Level#

advanced

Location#

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

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