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[Merged by Bors] - feat(data/equiv/fin): rename sum_fin_sum_equiv to fin_sum_fin_equiv #6857
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semorrison
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feat(data/equiv/fin): Equivalence of fin m ⊕ fin n and fin (m + n) or fin(n + m)
feat(data/equiv/fin): rename sum_fin_sum_equiv to fin_sum_fin_equiv
Mar 25, 2021
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…6857) Renames `sum_fin_sum_equiv` to `fin_sum_fin_equiv` (as discussed [on Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/sum_fin_add_comm_equiv)) Introduces a version with `fin(n + m)` instead of `fin(m + n)` Adds a bunch of simp lemmas for applying these (and their inverses)
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…6857) Renames `sum_fin_sum_equiv` to `fin_sum_fin_equiv` (as discussed [on Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/sum_fin_add_comm_equiv)) Introduces a version with `fin(n + m)` instead of `fin(m + n)` Adds a bunch of simp lemmas for applying these (and their inverses)
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feat(data/equiv/fin): rename sum_fin_sum_equiv to fin_sum_fin_equiv
[Merged by Bors] - feat(data/equiv/fin): rename sum_fin_sum_equiv to fin_sum_fin_equiv
Mar 29, 2021
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…6857) Renames `sum_fin_sum_equiv` to `fin_sum_fin_equiv` (as discussed [on Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/sum_fin_add_comm_equiv)) Introduces a version with `fin(n + m)` instead of `fin(m + n)` Adds a bunch of simp lemmas for applying these (and their inverses)
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Renames
sum_fin_sum_equiv
tofin_sum_fin_equiv
(as discussedon Zulip)
Introduces a version with
fin(n + m)
instead offin(m + n)
Adds a bunch of simp lemmas for applying these (and their inverses)