• Interaction With Adjunctions. Let $\webleft (F,G\webright )\colon \mathcal{C}\mathbin {\rightleftarrows }\mathcal{D}$ be an adjunction.
    1. If $F$ is dominant, then $G$ is faithful.
    2. The following conditions are equivalent:
      1. The functor $G$ is full.
      2. The restriction
        \[ \left.G\right\vert _{\mathrm{Im}_{F}}\colon \mathrm{Im}\webleft (F\webright )\to \mathcal{C} \]

        of $G$ to $\mathrm{Im}\webleft (F\webright )$ is full.


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