Mathlib Changelog
v4
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2026-08-12 08:59
fad8a153
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feat(Data/Finset):
insert a (s.erase a) = insert a s
(
#40775
)
Estimated changes
Modified
Mathlib/Data/Finset/Basic.lean
modified
theorem
Finset.insert_erase
added
theorem
Finset.insert_erase_eq_insert
Modified
Mathlib/Data/Finset/Fold.lean
Modified
Mathlib/RingTheory/Lasker.lean