Weak orders on symmetric groups and posets of support $τ$-tilting modules

Abstract: We give a necessary and sufficient condition for that the support $\tau$-tilting poset of a finite dimensional algebra is isomorphic to the poset of symmetric group with weak order. Moreover we show that there are infinitely many finite dimensional algebras whose support $\tau$-tilting posets are isomorphic to the poset of symmetric group with weak order.