2 problems

Let $A$ be a quasi-Cartan matrix compatible with a Coxeter group $W$, and let $p_{u,v}^{\mathbf{i}}(t)$ be the polynomial obtained from the universal Littlewood–Richardson polynomi…

Let $A$ be a quasi-Cartan matrix compatible with a Coxeter group $W$, and let $p_{u,v}^{\mathbf{i}}({\bf A})$ be the universal Littlewood–Richardson polynomial. Define … where $Id$…