• Symmetric Monoidality. The 7-tuple $\webleft(\phantom{\mathrlap {\alpha ^{\mathsf{Sets}}}}\mathsf{Sets}\right.$, $\mathchoice {\mathbin {\textstyle \coprod }}{\mathbin {\textstyle \coprod }}{\mathbin {\scriptstyle \textstyle \coprod }}{\mathbin {\scriptscriptstyle \textstyle \coprod }}$, $\text{Ø}$, $\alpha ^{\mathsf{Sets}}_{\mathchoice {\mathbin {\textstyle \coprod }}{\mathbin {\textstyle \coprod }}{\mathbin {\scriptstyle \textstyle \coprod }}{\mathbin {\scriptscriptstyle \textstyle \coprod }}}$, $\lambda ^{\mathsf{Sets}}_{\mathchoice {\mathbin {\textstyle \coprod }}{\mathbin {\textstyle \coprod }}{\mathbin {\scriptstyle \textstyle \coprod }}{\mathbin {\scriptscriptstyle \textstyle \coprod }}}$, $\rho ^{\mathsf{Sets}}_{\mathchoice {\mathbin {\textstyle \coprod }}{\mathbin {\textstyle \coprod }}{\mathbin {\scriptstyle \textstyle \coprod }}{\mathbin {\scriptscriptstyle \textstyle \coprod }}}$, $\left.\sigma ^{\mathsf{Sets}}\webright)$ is a symmetric monoidal category.

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