SNESCompositeType#

Determines how two or more preconditioners are composed with the SNESType of SNESCOMPOSITE

Synopsis#

typedef enum {
  SNES_COMPOSITE_ADDITIVE,
  SNES_COMPOSITE_MULTIPLICATIVE,
  SNES_COMPOSITE_ADDITIVEOPTIMAL
} SNESCompositeType;

Values#

  • SNES_COMPOSITE_ADDITIVE - results from application of all preconditioners are added together

  • SNES_COMPOSITE_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly computed after the previous preconditioner application

  • SNES_COMPOSITE_ADDITIVEOPTIMAL - uses a linear combination of the solutions obtained with each preconditioner that approximately minimize the function value at the new iteration.

See Also#

Preconditioners, PCCOMPOSITE, PCFIELDSPLIT, PC, PCCompositeSetType(), PCCompositeType

Level#

beginner

Location#

include/petscsnes.h

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