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math.QA2019
Set-theoretical solutions of the Yang-Baxter and pentagon equations on semigroups
Francesco Catino, Marzia Mazzotta, Paola Stefanelli
The Yang-Baxter and pentagon equations are two well-known equations of Mathematical Physic. If is a set, a map is said to be a set theoretical soluti…
math.QA2019
Set-theoretical solutions of the pentagon equation on groups
Francesco Catino, Marzia Mazzotta, Maria Maddalena Miccoli
Let be a set. A set-theoretical solution of the pentagon equation on is a map such that \begin{equation*} s_{23}\, s_{13}\, s_{12}=s_…