2 problems

Let $\operatorname{\mathfrak{q}}$ be a parabolic contraction, and let $\Lambda$ be the semigroup of weights of its semi-invariant algebra…

Let $\operatorname{\mathfrak{q}}^C$ be a parabolic contraction in type $C$, and let $\operatorname{\mathfrak{q}}^C_\Lambda$ denote its canonical truncation. Write…