Jack Chen-An Chou

collaborators

5 papers

math.CO2026

Asymptotically maximal Schubitopes

Jack Chen-An Chou, Linus Setiabrata

We find a layered permutation $w \in S_{n}$ whose Schubert polynomial $S_{w} (x_{1}, \dots, x_{n})$ has support of size asymptotically at least $n! / 4^{n}$ . This gives precise asympto…

math.CO2026

Coxeter and Schubert combinatorics of $I^¼$ -Involutions

Jack Chen-An Chou, Zachary Hamaker

The variety of complete quadrics is the wonderful compactification of $G L_{n} / O_{n}$ and admits a cell decomposition into Borel orbits indexed by combinatorial objects called $I^¼$ -invo…

math.CO2025

A positive combinatorial formula for the double Edelman--Greene coefficients

Jack Chen-An Chou, Tianyi Yu

Lam, Lee, and Shimozono introduced the double Stanley symmetric functions in their study of the equivariant geometry of the affine Grassmannian. They proved that the associated dou…

math.CO2025

Newton polytopes of fireworks Grothendieck polynomials

Jack Chen-An Chou, Linus Setiabrata

We show that the support of the Grothendieck polynomial $G_{w}$ of any fireworks permutation is as large as possible: a monomial appears in $G_{w}$ if and only if i…

math.CO2025

Grothendieck polynomials of inverse fireworks permutations

Chen-An Chou, Tianyi Yu

Pipedreams are combinatorial objects that compute Grothendieck polynomials. We introduce a new combinatorial object that naturally recast the pipedream formula. From this, we obtai…

Asymptotically maximal Schubitopes

Coxeter and Schubert combinatorics of I^¼-Involutions

A positive combinatorial formula for the double Edelman--Greene coefficients

Newton polytopes of fireworks Grothendieck polynomials

Grothendieck polynomials of inverse fireworks permutations

Coxeter and Schubert combinatorics of $I^¼$ -Involutions