[Merged by Bors] - feat(data/fin): bundled embedding #3822
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Add the coercion from `fin n` to `ℕ` as a bundled embedding, an equivalent of `function.embedding.subtype`. Once lean#359 is fixed (making `fin n` a subtype), this can go away as a duplicate, but until then it is useful.
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simp lemma about applying it to an argument? |
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Add the coercion from `fin n` to `ℕ` as a bundled embedding, an equivalent of `function.embedding.subtype`. Once leanprover-community/lean#359 is fixed (making `fin n` a subtype), this can go away as a duplicate, but until then it is useful.
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Add the coercion from
fin ntoℕas a bundled embedding, anequivalent of
function.embedding.subtype. Once leanprover-community/lean#359 is fixed(making
fin na subtype), this can go away as a duplicate, but untilthen it is useful.