[petsc-users] modeling a dual mesh

[Marco Zocca]

What construct can I use to build and keep track (i.e. map over) a
staggered index set, i.e. the dual (vertices, elements) meshes for a FEM
application.

I am looking for the equivalent, on a regular mesh, of the `sieve`
construction (
http://www.mcs.anl.gov/petsc/documentation/tutorials/sieve.pdf , which I
understand to be only available for DMPLEX).

I could hack together my own by using DM and IS, but I'd first like to be
sure about the non-existence of current implementations.

Thank you in advance,

Marco
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