petsc-master 2019-11-11
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PCDeflationSpaceType

Type of deflation

Synopsis

typedef enum {
  PC_DEFLATION_SPACE_HAAR,
  PC_DEFLATION_SPACE_DB2,
  PC_DEFLATION_SPACE_DB4,
  PC_DEFLATION_SPACE_DB8,
  PC_DEFLATION_SPACE_DB16,
  PC_DEFLATION_SPACE_BIORTH22,
  PC_DEFLATION_SPACE_MEYER,
  PC_DEFLATION_SPACE_AGGREGATION,
  PC_DEFLATION_SPACE_USER
} PCDeflationSpaceType;

Values

PC_DEFLATION_SPACE_HAAR - directly assembled based on Haar (db2) wavelet with overflowed filter cuted-off
PC_DEFLATION_SPACE_DB2 - MATCOMPOSITE of 1-lvl matices based on db2 (2 coefficient Daubechies / Haar wavelet)
PC_DEFLATION_SPACE_DB4 - same as above, but with db4 (4 coefficient Daubechies)
PC_DEFLATION_SPACE_DB8 - same as above, but with db8 (8 coefficient Daubechies)
PC_DEFLATION_SPACE_DB16 - same as above, but with db16 (16 coefficient Daubechies)
PC_DEFLATION_SPACE_BIORTH22 - same as above, but with biorthogonal 2.2 (6 coefficients)
PC_DEFLATION_SPACE_MEYER - same as above, but with Meyer/FIR (62 coefficients)
PC_DEFLATION_SPACE_AGGREGATION - aggregates local indices (given by operator matix distribution) into a subdomain
PC_DEFLATION_SPACE_USER - indicates space set by user

Notes

Wavelet-based space (except Haar) can be used in multilevel deflation.

See Also

PCDeflationSetSpaceToCompute(), PCDEFLATION

Level

intermediate

Location

src/ksp/pc/../../../include/petscpctypes.h
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages