petsc-3.14.6 2021-03-30
PetscSection
Mapping from integers in a designated range to contiguous sets of integers.
Synopsis
typedef struct _p_PetscSection *PetscSection;
In contrast to IS, which maps from integers to single integers, the range of a PetscSection is in the space of
contiguous sets of integers. These ranges are frequently interpreted as domains of other array-like objects,
especially other PetscSections, Vecs, and ISs. The domain is set with PetscSectionSetChart() and does not need to
start at 0. For each point in the domain of a PetscSection, the output set is represented through an offset and a
count, which are set using PetscSectionSetOffset() and PetscSectionSetDof() respectively. Lookup is typically using
accessors or routines like VecGetValuesSection().
See Also
PetscSectionCreate(), PetscSectionDestroy(), PetscSectionSym
Level
beginner
Location
src/vec/is/section/../../../../include/petscsectiontypes.h
Examples
src/dm/impls/stag/tutorials/ex1.c.html
src/ts/tutorials/ex11.c.html
Implementations
_p_PetscSection in include/petsc/private/sectionimpl.h
Index of all PetscSection routines
Table of Contents for all manual pages
Index of all manual pages