2 papers
math.CO2026
Positive formulas for q-Zeta numerators of Ferrers-cell posets
Qihang Wang, Weiye Li
We give explicit positive formulas for Chapoton's -Zeta numerators of the Ferrers-cell posets , where $b_1\geq\cdots\geq…
math.CO2026
Four Special Directions in AG(2,13): The 52-Point Obstruction and the Sharp Minimum
Qihang Wang
We prove that no -point subset of the affine plane has exactly four special directions, where a direction is special when its thirteen parallel affine line…