jlchan / StartUpDG.jl

Initializes and sets up reference elements and physical meshes for DG.
MIT License
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Jacobian computations are inexact on curved meshes #65

Open jlchan opened 1 year ago

jlchan commented 1 year ago

Currently, we compute J at interpolation points. This is exact when J is a low enough degree polynomial, but in general it is degree d(N-2) in d dimensions so this approximation may not be exact on curved isoparametric meshes.

This probably isn't a big issue now, but if exactness of the global quadrature wJq is needed, this can be problematic.