petsc-3.13.1 2020-05-02
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PetscDTEnumSubset

Split the integers [0, ..., n - 1] into two complementary ordered subsets, the first subset of size k and being the jth subset of that size in lexicographic order.

Input Arguments

n - a non-negative integer (see note about limits below)
k - an integer in [0, n]
j - an index in [0, n choose k)

Output Arguments

perm - the jth subset of size k of the integers [0, ..., n - 1], followed by its complementary set.
isOdd - if not NULL, return whether perm is an even or odd permutation.

Note: this is limited by arguments such that n choose k can be represented by PetscInt

See Also

PetscDTEnumSubset(), PetscDTSubsetIndex()

Level

beginner

Location

src/dm/dt/space/../../../../include/petscdt.h
Index of all SPACE routines
Table of Contents for all manual pages
Index of all manual pages