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Diff — Surjective function

Revision #2154 → #2650 · back to history

modifiedSurjections are epimorphisms in Set0ccd08de5ebf
FieldFrom #2154To #2650
mathlib.declCategoryTheory.Types.epi_iff_surjectiveCategoryTheory.epi_iff_surjective
provenanceaiai-moderated
modifiedFinite equal-size: surjective iff injective73152939e59e
FieldFrom #2154To #2650
mathlib.declFintype.injective_iff_surjective_of_equivFinite.injective_iff_surjective_of_equiv
provenanceaiai-moderated