• Interaction With Internal Homs III. The diagram

    commutes, i.e. we have

    \[ \webleft[U,\bigcup _{V\in \mathcal{V}}V\webright]_{X}= \bigcup _{V\in \mathcal{V}}\webleft [U,V\webright ]_{X} \]

    for each $U\in \mathcal{P}\webleft (X\webright )$ and each $\mathcal{V}\in \mathcal{P}\webleft (\mathcal{P}\webleft (X\webright )\webright )$.


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