[Merged by Bors] - chore: forward-port leanprover-community/mathlib#18429#2220
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[Merged by Bors] - chore: forward-port leanprover-community/mathlib#18429#2220eric-wieser wants to merge 7 commits intomasterfrom
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Also removes a duplicate lemma that was added by accident while porting.
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…18429) Everything in this file about `multiset.pi.cons` generalizes to `Sort`. The parts of the file which don't generalize now use `β` instead. This is motivated by #18417, though I do not know if supporting `Sort` is actually important there. Forward-ported as leanprover-community/mathlib4#2220
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| theorem pi.con_ext {m : Multiset α} {a : α} (f : ∀ a' ∈ a ::ₘ m, δ a') : | ||
| (Pi.cons m a (f _ (mem_cons_self _ _)) fun a' ha' => f a' (mem_cons_of_mem ha')) = f := by simp | ||
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pi.cons_ext exists immediately above with the same statement; I would guess this was an accidentally-committed test.
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Also removes a duplicate lemma that was added by accident while porting.
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Also removes a duplicate lemma that was added by accident while porting.
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Build failed (retrying...):
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bors bot
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Mar 19, 2023
Also removes a duplicate lemma that was added by accident while porting.
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Also removes a duplicate lemma that was added by accident while porting.
Finset.pi.cons#2553data.multiset.pi@9003f28797c0664a49e4179487267c494477d853..4c586d291f189eecb9d00581aeb3dd998ac34442data.finset.pi@9003f28797c0664a49e4179487267c494477d853..4c586d291f189eecb9d00581aeb3dd998ac34442