[petsc-dev] DMPlex "chart" term

[Patrick Sanan]

Another terminology question to help with the docs.

What's the origin of the term "chart" in DMPlex? I'm only previously
familiar with the term in the context of manifolds (where chart =
homeomorphism from an open set in the manifold to an open set in R^n).

In terms of the use in DMPlex, is there anything wrong with thinking of
"chart" as a shorter way to say "interval of integers, closed on the left
and open on the right, e.g.  [pStart,pEnd)"?
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