# mathlibdocumentation

category_theory.concrete_category.reflects_isomorphisms

A forget₂ C D forgetful functor between concrete categories C and D whose forgetful functors both reflect isomorphisms, itself reflects isomorphisms.

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@[instance]

A forget₂ C D forgetful functor between concrete categories C and D where forget C reflects isomorphisms, itself reflects isomorphisms.

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