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[Zohar <>]

I'm doing simplification of a mesh with parametrization, style:

(Bommes13) "Integer-Grid Maps for Reliable Quad Meshing"

The simplification is done in domain (R^2) as well as the surface (R^3). I
start with a bijective parametrization, and I want to keep it this way. So,
if an edge which is about to collapse is going to violate bijectivity, I'd
like it not be collapsed at this state of the mesh.



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