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refactoring the Lower envelope stuff (#236) + progress on planar sepa…
…rators * Upper Hull in R^3 using duality and the native lower envelope algo * fiddling * moving MonoidalMap to a separate file + moving Graph into separate file * refactoring ; splitting the new regions implementation into sub modules * updated the readme with the new ci * fix tests * constructing the triangulated graph :) * cleaning up * deleting useless file * caching * using restore keys * one more degenerate testcase * more work on computing a separator * refactor path * finding a node to root path :) * finding paths * polishing * some refactoring and cleaning up * more separator stuff * dealing with reoot splits
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hgeometry/data/test-with-ipe/Plane/LowerEnvelope/degenerate2_out.ipe
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