_-PhdZddlmZddlmZddlmZddlmZddl m Z ddl m Z ddl mZdd lmZdd lmZdd lmZdd lmZgd ZdS)adKrylov solvers. This module contains several Krylov subspace methods, in addition to two simple iterations, to solve linear systems iteratively. These methods often use multigrid as a preconditioner to accelerate convergence to the solution. See [1]_ and [2]_. Functions --------- - gmres - fgmres - cgne - cgnr - cg - bicgstab - steepest descent, (simple iteration) - minimal residual (MR), (simple iteration) References ---------- .. [1] Yousef Saad, "Iterative Methods for Sparse Linear Systems, Second Edition", SIAM, pp. 231-234, 2003 http://www-users.cs.umn.edu/~saad/books.html .. [2] Richard Barrett et al. "Templates for the Solution of Linear Systems: Building Blocks for Iterative Methods, 2nd Edition", SIAM http://www.netlib.org/linalg/html_templates/Templates.html http://www.netlib.org/templates/ )gmres)gmres_householder) gmres_mgs)fgmres)cg)cr)cgnr)cgne)bicgstab)steepest_descent)minimal_residual) rrrrrrr r r r r N)__doc___gmresr_gmres_householderr _gmres_mgsr_fgmresr_cgr_crr_cgnrr _cgner _bicgstabr _steepest_descentr _minimal_residualr __all__U/var/www/html/test/jupyter/venv/lib/python3.11/site-packages/pyamg/krylov/__init__.pyrs>111111!!!!!!////////////   r