SNESVISetComputeVariableBounds#

Sets a function that is called to compute the bounds on variable for (differential) variable inequalities.

Synopsis#

#include "petscsnes.h" 
PetscErrorCode SNESVISetComputeVariableBounds(SNES snes, PetscErrorCode (*compute)(SNES, Vec, Vec))

Input parameter#

  • snes - the SNES context

  • compute - function that computes the bounds

Calling Sequence of compute#

$ PetscErrorCode compute(SNES snes, Vec lower, Vec higher)

  • snes - the SNES context

  • lower - vector to hold lower bounds

  • higher - vector to hold upper bounds

Notes#

Problems with bound constraints can be solved with the reduced space, SNESVINEWTONRSLS, and semi-smooth SNESVINEWTONSSLS solvers.

For entries with no bounds you can set PETSC_NINFINITY or PETSC_INFINITY

You may use SNESVISetVariableBounds() to provide the bounds once if they will never change

If you have associated a DM with the SNES and provided a function to the DM via DMSetVariableBounds() that will be used automatically to provide the bounds and you need not use this function.

See Also#

Variational Inequalities, SNES, SNESVISetVariableBounds(), DMSetVariableBounds(), SNESSetFunctionDomainError(), SNESSetJacobianDomainError(), SNESVINEWTONRSLS, SNESVINEWTONSSLS, ‘SNESSetType()`

Level#

advanced

Location#

src/snes/impls/vi/vi.c

Examples#

src/snes/tutorials/ex58.c
src/snes/tutorials/ex9.c

Implementations#

SNESVISetComputeVariableBounds_VI in src/snes/impls/vi/vi.c

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