The knot quandle of the twist-spun trefoil is a central extension of a Schläfli quandle

Abstract: A quandle is an algebraic system which excels at describing limited symmetries of a space. We introduce the concept of Schl\"{a}fli quandles which are defined relating to chosen rotational symmetries of regular tessellations. On the other hand, quandles have a good chemistry with knot theory. Associated with a knot we have its knot quandle. We show that the knot quandle of the $m$-twist-spun trefoil is a central extension of the Schl\"{a}fli quandle related to the regular tessellation ${ 3, m }$ in the sense of the Schl\"{a}fli symbol if $m \geq 3$.