Linus Setiabrata

activity

20242026

collaborators

4 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.RT2026

Hikita surjectivity for $N /// T$

Linus Setiabrata

The Hamiltonian reduction $N /// T$ of the nilpotent cone in $sl_{n}$ by the torus of diagonal matrices is a Nakajima quiver variety which admits a symplectic resol…

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.CO2024

Double orthodontia formulas and Lascoux positivity

Linus Setiabrata, Avery St. Dizier

We give a new formula for double Grothendieck polynomials based on Magyar's orthodontia algorithm for diagrams. Our formula implies a similar formula for double Schubert polynomial…

Asymptotically maximal Schubitopes

Hikita surjectivity for N///T

Newton polytopes of fireworks Grothendieck polynomials

Double orthodontia formulas and Lascoux positivity

Hikita surjectivity for $N /// T$