A $1$-morphism $f\colon A\to B$ of $\mathcal{C}$ is representably full[1] if, for each $X\in \text{Obj}\webleft (\mathcal{C}\webright )$, the functor

\[ f_{*}\colon \mathsf{Hom}_{\mathcal{C}}\webleft (X,A\webright )\to \mathsf{Hom}_{\mathcal{C}}\webleft (X,B\webright ) \]

given by postcomposition by $f$ is full.


Footnotes

[1] Further Terminology: Also called simply a full morphism, based on Item 1 of Example 9.1.2.1.3.

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