feat(algebra/incidence): Incidence algebras #11656
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…munity/mathlib into incidence_algebra
…athlib into incidence_algebra
…munity/mathlib into incidence_algebra
…munity/mathlib into incidence_algebra
alexjbest
reviewed
May 9, 2023
alexjbest
reviewed
May 9, 2023
semorrison
added
the
too-late
This commit is the last that is guaranteed to be synchronized with mathlib4
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Ported to LeanCamCombi |
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Link? |
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Secret so far because I'm fighting mathport :P |
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ok please post it here when its done! |
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Define
incidence_algebra 𝕜 αas theαincidence algebra over𝕜.Co-authored-by: Alex J. Best alex.j.best@gmail.com
We will soon ship a PR for the first half of the file. Finset prerequisites are getting PRed separately too.