[Merged by Bors] - feat: the disjoint union of smooth manifolds#20659
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[Merged by Bors] - feat: the disjoint union of smooth manifolds#20659
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grunweg
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Jan 11, 2025
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kim-em
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Jan 12, 2025
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Looking forward to seeing a splitting PR here sometime! :-)
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Good idea, but let's do that in a different PR :-)
jcommelin
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Jan 14, 2025
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- the disjoint union of smooth manifolds is a smooth manifold - the interior and boundary are the disjoint union of the interior and boundary; the disjoint union of boundaryless manifolds is boundaryless A future PR will prove that `Sum.inl` and `Sum.inr` between `C^n` manifolds are C^n. From my bordism theory branch.
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A future PR will prove that
Sum.inlandSum.inrbetweenC^nmanifolds are C^n.From my bordism theory branch.