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contMDiff_of_contMDiffOn_iUnion_of_isOpen
Modification history
2025-07-04 16:21
Mathlib/Geometry/Manifold/ContMDiff/Basic.lean
feat: `contMDiffOn_iUnion_iff_of_isOpen` (#26673) …
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contMDiff_of_contMDiffOn_iUnion_of_isOpen
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