• Adjointness. We have adjunctions
    witnessed by bijections
    \begin{align*} \textup{Hom}_{\mathsf{Sets}_{*}}\webleft (X\wedge Y,Z\webright ) & \cong \textup{Hom}_{\mathsf{Sets}_{*}}\webleft (X,\textbf{Sets}_{*}\webleft (Y,Z\webright )\webright ),\\ \textup{Hom}_{\mathsf{Sets}_{*}}\webleft (X\wedge Y,Z\webright ) & \cong \textup{Hom}_{\mathsf{Sets}_{*}}\webleft (X,\textbf{Sets}_{*}\webleft (A,Z\webright )\webright ), \end{align*}

    natural in $\webleft (X,x_{0}\webright ),\webleft (Y,y_{0}\webright ),\webleft (Z,z_{0}\webright )\in \text{Obj}\webleft (\mathsf{Sets}_{*}\webright )$.


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