最終更新日：2025/12/05
In the category, the inclusion map i: A → B is a split monomorphism, so there exists a morphism r: B → A with r ∘ i = id_A.
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In the category, the inclusion map i: A → B is a split monomorphism, so there exists a morphism r: B → A with r ∘ i = id_A.
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