We write[1] $x\rhd y$ for the element $\webleft [\webleft (x,y\webright )\webright ]$ of

\[ X\rhd Y\cong \left\lvert X\right\rvert \odot Y. \]

Footnotes

[1] Further Notation: Also written $x\rhd _{\mathsf{Sets}_{*}}y$.

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