PetscApproximateLTE#

Performs a less than or equal to on a given constant with a fudge for floating point numbers

Synopsis#

#include <petscmath.h>
bool PetscApproximateLTE(PetscReal x,constant float)

Not Collective

Input Parameters#

  • x - the variable

  • b - the constant float it is checking if x is less than or equal to

Notes#

The fudge factor is the value PETSC_SMALL

The constant numerical value is automatically set to the appropriate precision of PETSc so can just be provided as, for example, 3.2

This is used in several examples for setting initial conditions based on coordinate values that are computed with i*h that produces inexact floating point results.

See Also#

PetscMax(), PetscMin(), PetscAbsInt(), PetscAbsReal(), PetscApproximateGTE()

Level#

advanced

Location#

include/petscmath.h

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