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Commit 2022-10-12 01:16 8853975e

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feat(category_theory): yoneda functor on abelian category preserves finite colimits iff object is injective (#16893)

Estimated changes

Created src/category_theory/abelian/injective.lean

added theorem category_theory.injective_of_preserves_finite_colimits_preadditive_yoneda_obj

added def category_theory.preserves_finite_colimits_preadditive_yoneda_obj_of_injective

Modified src/category_theory/abelian/projective.lean

modified theorem category_theory.exact_d_f

added def category_theory.preserves_finite_colimits_preadditive_coyoneda_obj_of_projective

added theorem category_theory.projective_of_preserves_finite_colimits_preadditive_coyoneda_obj