Yichen Ma

collaborators

4 papers

math.CO2025

Convex Geometries via Hopf Monoids: Combinatorial Invariants, Reciprocity, and Supersolvability

Yichen Ma

We study the Hopf monoid of convex geometries, which contains partial orders as a Hopf submonoid, and investigate the combinatorial invariants arising from canonical characters. Ea…

math.CO2025

Kohnert posets and polynomials of northeast diagrams

Aram Bingham, Beth Anne Castellano, Kimberly P. Hadaway +4

Kohnert polynomials and their associated posets are combinatorial objects with deep geometric and representation theoretic connections, generalizing both Schubert polynomials and t…

math.CO2024

Involution matrix loci and orbit harmonics

Moxuan J. Liu, Yichen Ma, Brendon Rhoades +1

Let $Mat_{n \times n} (C)$ be the affine space of $n \times n$ complex matrices with coordinate ring $C [x_{n \times n}]$ . We define graded quotie…

math.DG2024

Strongly Gauduchon Hyperbolicity and Two Other Types of Hyperbolicity

Yi Ma

This paper proposes sG-hyperbolicity as a new tool for studying hyperbolicity on complex manifolds. It demonstrates that this notion leads to a wider class of divisorially hyperbol…