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 snes, Vec lower, Vec higher))

Input Parameters

• snes - the SNES context

• compute - function that computes the bounds

Calling sequence of compute

• 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(), PETSC_NINFINITY, PETSC_INFINITY

Level

advanced

Location

src/snes/impls/vi/vi.c

Examples

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

Implementations

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

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