The Sieve DAG for most topologies is a graded poset (http://en.wikipedia.org/wiki/Graded_poset), and can be illustrated by Hasse Diagram (a http://en.wikipedia.org/wiki/Hasse_diagram). The strata group all points of the same grade, and this function calculates the strata. This grade can be seen as the height (or depth) of the point in the DAG.
PetscErrorCode DMComplexStratify(DM dm)
mesh -The DMComplex
The normal association for the point grade is element dimension (or co-dimension). For instance, all vertices would
have depth 0, and all edges depth 1. Likewise, all cells heights would have height 0, and all faces height 1.
This should be called after all calls to DMComplexSymmetrize()
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages