PCSPAI#

Use the Sparse Approximate Inverse method

Options Database Keys#

  • -pc_spai_epsilon - set tolerance

  • -pc_spai_nbstep - set nbsteps

  • -pc_spai_max - set max

  • -pc_spai_max_new - set maxnew

  • -pc_spai_block_size - set block size

  • -pc_spai_cache_size - set cache size

  • -pc_spai_sp - set sp

  • -pc_spai_set_verbose <true,false> - verbose output

Note#

This only works with MATAIJ matrices.

References#

. * - Grote and Barnard (SIAM J. Sci. Comput.; vol 18, nr 3)

See Also#

PCCreate(), PCSetType(), PCType, PC, PCSPAISetEpsilon(), PCSPAISetMax(), PCSPAISetMaxNew(), PCSPAISetBlockSize(), PCSPAISetVerbose(), PCSPAISetSp(), PCSPAISetNBSteps(), PCSPAISetCacheSize()

Level#

beginner

Location#

src/ksp/pc/impls/spai/ispai.c

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