feat(order/galois_connection): lemmas about galois insertions and supr/infi #2052
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jcommelin
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What are these new lemmas for? |
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I was defining the complete lattice structure on the type of faces of a convex set. You can take the smallest face containing a collection of faces, defined as the intersection of all faces that contain the collection. Together with the "forgetful map" from faces to subsets, you have a galois insertion (between the dual lattice structures). To show that intersections in the lattice structure of faces behave the way you expect, I figured out I needed lemmas like those in this PR. |
digama0
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…r/infi (leanprover-community#2052) * feat(order/galois_connection): lemmas about galois insertions and supr/infi * Fix build, hopefully Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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…r/infi (leanprover-community#2052) * feat(order/galois_connection): lemmas about galois insertions and supr/infi * Fix build, hopefully Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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