Weiye Li

Positive formulas for q-Zeta numerators of Ferrers-cell posets

We establish explicit positive formulas for Chapoton's q-Zeta numerators of Ferrers-cell posets F_b = {(i,c): 1 <= i <= r, i <= c <= b_i}, for every integer r >= 1 and every boundary sequence b_1 >= ... >= b_r >= r, together with formulas for every interval of their minimum-augme...

A Ballot-Word Formula for q-Zeta Numerators of Type-B Root Posets

We determine the Chapoton q-Zeta numerator for the full positive-root poset of standard Lie type B_r, graded by root height minus one and normalized with Chapoton's fixed denominator convention. For every standard Lie rank r >= 1, we identify the root poset with a trapezoidal cel...