Lorentzian polynomials

P Brändén, J Huh - Annals of Mathematics, 2020 - projecteuclid.org
We study the class of Lorentzian polynomials. The class contains homogeneous stable
polynomials as well as volume polynomials of convex bodies and projective varieties. We …

[PDF][PDF] Combinatorics and Hodge theory

J Huh - Proceedings of the international congress of …, 2022 - ncatlab.org
I will tell two interrelated stories illustrating fruitful interactions between combinatorics and
Hodge theory. The first is that of Lorentzian polynomials, based on my joint work with Petter …

Lower tail large deviations of the stochastic six vertex model

S Das, Y Liao, M Mucciconi - arXiv preprint arXiv:2407.08530, 2024 - arxiv.org
In this paper, we study lower tail probabilities of the height function $\mathfrak {h}(M, N) $ of
the stochastic six-vertex model. We introduce a novel combinatorial approach to …

The Newton polytope and Lorentzian property of chromatic symmetric functions

JP Matherne, AH Morales, J Selover - Selecta Mathematica, 2024 - Springer
Chromatic symmetric functions are well-studied symmetric functions in algebraic
combinatorics that generalize the chromatic polynomial and are related to Hessenberg …

When are multidegrees positive?

F Castillo, Y Cid-Ruiz, B Li, J Montaño… - Advances in Mathematics, 2020 - Elsevier
Let k be an arbitrary field, P= P km 1× k⋯× k P kmp be a multiprojective space over k, and
X⊆ P be a closed subscheme of P. We provide necessary and sufficient conditions for the …

Multidegrees, prime ideals, and non-standard gradings

A Caminata, Y Cid-Ruiz, A Conca - Advances in Mathematics, 2023 - Elsevier
We study several properties of multihomogeneous prime ideals. We show that the
multigraded generic initial ideal of a prime has very special properties, for instance, its …

M-Convexity of Vexillary Grothendieck Polynomials via Bubbling

ES Hafner, K Mészáros, L Setiabrata… - SIAM Journal on Discrete …, 2024 - SIAM
We introduce bubbling diagrams and show that they compute the support of the
Grothendieck polynomial of any vexillary permutation. Using these diagrams, we show that …

K-polynomials of multiplicity-free varieties

F Castillo, Y Cid-Ruiz, F Mohammadi… - arXiv preprint arXiv …, 2022 - arxiv.org
We describe the twisted $ K $-polynomial of multiplicity-free varieties in a multiprojective
setting. More precisely, for multiplicity-free varieties, we show that the support of the twisted …

[HTML][HTML] On the convexity of general inverse σk equations

CM Lin - Journal of Functional Analysis, 2023 - Elsevier
We prove that if a level set of a degree n general inverse σ k equation f (λ 1,⋯, λ n):= λ 1⋯ λ
n−∑ k= 0 n− 1 ck σ k (λ)= 0 is contained in q+ Γ n for some q∈ R n, where ck are real …

On the support of Grothendieck polynomials

K Mészáros, L Setiabrata, AS Dizier - Annals of Combinatorics, 2024 - Springer
Grothendieck polynomials G w of permutations w∈ S n were introduced by Lascoux and
Schützenberger (CR Acad Sci Paris Sér I Math 295 (11): 629–633, 1982) as a set of …