PETSC_SMALL

an arbitrary “small” number which depends on the precision of PetscReal used in some PETSc examples and in PetscApproximateLTE() and PetscApproximateGTE() to determine if a computation was successful.

Note

See PETSC_MACHINE_EPSILON

See Also

PetscApproximateLTE(), PetscApproximateGTE(), PETSC_MAX_REAL, PETSC_MIN_REAL, PETSC_REAL_MIN, PETSC_MACHINE_EPSILON, PETSC_SQRT_MACHINE_EPSILON

Level

beginner

Location

include/petscmath.h

Examples

src/snes/tutorials/ex69.c
src/vec/vec/tutorials/ex9.c
src/ksp/ksp/tutorials/ex70.c
src/vec/vec/tutorials/ex1f.F90
src/vec/vec/tutorials/ex1.c
src/ts/tutorials/ex53.c
src/ksp/ksp/tutorials/ex5.c
src/ksp/ksp/tutorials/ex5f.F90
src/ksp/ksp/tutorials/ex87.c

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Index of all Sys routines
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Index of all manual pages