Theorem CategoryTheory.Abelian.Ext.mk₀_id_comp

Modification history

2024-07-15 21:28
Mathlib/Algebra/Homology/DerivedCategory/Ext.lean
feat: the abelian group structure on Ext-groups in abelian categories (#14496) …
Added CategoryTheory.Abelian.Ext.mk₀_id_compView on Github →