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CategoryTheory.IsPushout.of_horiz_isIso_epi
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2025-07-15 08:52
Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean
feat(CategoryTheory/Topos): subobject classifier without limits (#26556) …
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CategoryTheory.IsPushout.of_horiz_isIso_epi
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