petsc-master 2017-01-20
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Mapping from integers in a designated range to contiguous sets of integers.


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()

Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages