PETSc version 3.17.4
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# PetscSectionSymLabelGetStratum

get the symmetries for the orientations of a stratum

### Synopsis

    #include "petscdmlabel.h"
    #include "petscsection.h"
    PetscErrorCode PetscSectionSymLabelGetStratum(PetscSectionSym sym, PetscInt stratum, PetscInt *size, PetscInt *minOrient, PetscInt *maxOrient, const PetscInt ***perms, const PetscScalar ***rots)

Logically collective on sym

### Input Parameters

| sym | - the section symmetries
| stratum | - the stratum value in the label that we are assigning symmetries for

### Output Parameters

| size | - the number of dofs for points in the stratum of the label
| minOrient | - the smallest orientation for a point in this stratum
| maxOrient | - one greater than the largest orientation for a ppoint in this stratum (i.e., orientations are in the range [minOrient, maxOrient))
| perms | - NULL if there are no permutations, or (maxOrient - minOrient) permutations, one for each orientation. A NULL permutation is the identity
| rots | - NULL if there are no rotations, or (maxOrient - minOrient) sets of rotations, one for each orientation. A NULL set of orientations is the identity

### See Also

PetscSectionSymLabelSetStratum(), PetscSectionSymCreate(), PetscSectionSetSym(), PetscSectionGetPointSyms(), PetscSectionSymCreateLabel()

### Level

developer

### Location

src/dm/label/dmlabel.c
Index of all DMLABEL routines
Table of Contents for all manual pages
Index of all manual pages