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 matrix distribution) into a subdomain

• PC_DEFLATION_SPACE_USER - indicates space set by user

Note

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

See Also

Preconditioners, PCDeflationSetSpaceToCompute(), PCDEFLATION, PC

Level

intermediate

Location

include/petscpctypes.h

---

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