A central idempotent in the endomorphism algebra of a finite lattice
Serge Bouc, Jacques Thévenaz·2019-02-28·via math.CO updates on arXiv.org
We give a direct construction of a specific idempotent in the endomorphism algebra of a finite lattice $T$. This idempotent is associated with all possible sublattices of $T$ which are total orders.