-snes_ngmres_select_type<difference,none,linesearch> | - choose the select between candidate and combined solution Many br | |
-snes_ngmres_restart_type<difference,none,periodic> | - choose the restart conditions Many br | |
-snes_ngmres_candidate | - Use NGMRES variant which combines candidate solutions instead of actual solutions Many br | |
-snes_ngmres_m | - Number of stored previous solutions and residuals Many br | |
-snes_ngmres_restart_it | - Number of iterations the restart conditions hold before restart Many br | |
-snes_ngmres_gammaA | - Residual tolerance for solution select between the candidate and combination Many br | |
-snes_ngmres_gammaC | - Residual tolerance for restart Many br | |
-snes_ngmres_epsilonB | - Difference tolerance between subsequent solutions triggering restart Many br | |
-snes_ngmres_deltaB | - Difference tolerance between residuals triggering restart Many br | |
-snes_ngmres_restart_fm_rise | - Restart on residual rise from x_M step Many br | |
-snes_ngmres_monitor | - Prints relevant information about the ngmres iteration Many br | |
-snes_linesearch_type <basic,l2,cp> | - Line search type used for the default smoother Many br | |
-additive_snes_linesearch_type | - linesearch type used to select between the candidate and combined solution with additive select type Many br |
The N-GMRES method combines m previous solutions into a minimum-residual solution by solving a small linearized Many broptimization problem at each iteration. Many br
Very similar to the SNESANDERSON algorithm. Many br
1. | - C. W. Oosterlee and T. Washio, "Krylov Subspace Acceleration of Nonlinear Multigrid with Application to Recirculating Flows", Many brSIAM Journal on Scientific Computing, 21(5), 2000. Many br | |
2. | - Peter R. Brune, Matthew G. Knepley, Barry F. Smith, and Xuemin Tu, "Composing Scalable Nonlinear Algebraic Solvers", Many brSIAM Review, 57(4), 2015 Many br |
Level:beginner
Location:src/snes/impls/ngmres/snesngmres.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages