Mathlib Changelog
v4
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2025-11-05 02:43
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feat(Data/List/GetD):
getD
is surjective iff every element is in the list (
#30217
)
Estimated changes
Modified
Mathlib/Data/List/GetD.lean
added
theorem
List.getD_surjective
added
theorem
List.getD_surjective_iff