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A theorem of Green says that a line bundle of degree at least $2g+1+p$ on a smooth curve $X$ of genus $g$ has property $N_p$. We prove a similar conclusion for certain singular, reducible curves $X$ under suitable degree bounds over all…

Algebraic Geometry · Mathematics 2015-11-04 Ziv Ran

We extend the theory of topological recursion by considering Airy structures whose partition functions are highest weight vectors of particular $\mathcal{W}$-algebra representations. Such highest weight vectors arise as partition functions…

Mathematical Physics · Physics 2025-01-22 Raphaël Belliard , Vincent Bouchard , Reinier Kramer , Tanner Nelson

The genus 0, fixed-domain log Gromov-Witten invariants of a smooth, projective toric variety X enumerate maps from a general pointed rational curve to a smooth, projective toric variety passing through the maximal number of general points…

Algebraic Geometry · Mathematics 2026-01-07 Carl Lian , Naufil Sakran

Surjective homological epimorphisms with stratifying kernel can be used to construct recollements of derived module categories. These `stratifying' recollements are derived from recollements of module categories. Can every recollement be…

Representation Theory · Mathematics 2016-06-28 Lidia Angeleri H\" ugel , Steffen Koenig , Qunhua Liu , Dong Yang

In this paper, firstly we study the continuity of the core-EP inverse without explicit error bounds by virtue of two methods. One is the rank equality, followed from the classical generalized inverse. The other one is matrix decomposition.…

Rings and Algebras · Mathematics 2018-07-02 Yuefeng Gao , Jianlong Chen , Pedro Patricio

The constant curvature analogue on the two-dimensional sphere and the hyperbolic space of the integrable H\'enon-Heiles Hamiltonian $\mathcal{H}$ given by $$ \mathcal{H}=\dfrac{1}{2}(p_{1}^{2}+p_{2}^{2})+ \Omega \left(q_{1}^{2}+ 4…

Exactly Solvable and Integrable Systems · Physics 2015-04-15 Angel Ballesteros , Alfonso Blasco , Francisco J. Herranz

We prove that stably isomorphic vector bundles of rank d-1 on a smooth affine d-fold X over an algebraically closed field k are indeed isomorphic, provided d! is invertible in k. This answers an old conjecture of Suslin.

Algebraic Geometry · Mathematics 2024-12-11 Jean Fasel

We propose a generalization of the Witten conjecture, which connects a descendent enumerative theory with a specific reduction of KP integrable hierarchy. Our conjecture is realized by two parts: Part I (Geometry) establishes a…

Mathematical Physics · Physics 2025-07-16 Shuai Guo , Ce Ji , Qingsheng Zhang

In this article we describe the $T_{comp}$-equivariant topological $K$-ring of a $T$-{\it cellular} complete toric variety. We further show that $K_{T_{comp}}^0(X)$ is isomorphic as an $R(T_{comp})$-algebra to the ring of piecewise Laurent…

K-Theory and Homology · Mathematics 2025-02-04 V. Uma

Let $E$ be an $1$-Ahlfors regular subset of the Heisenberg group $\mathbb{H}$. We prove that there exists a $-1$-homogeneous kernel $K_1$ such that if $E$ is contained in a $1$-regular curve the corresponding singular integral is bounded in…

Classical Analysis and ODEs · Mathematics 2019-09-17 Vasileios Chousionis , Sean Li

We present a structural resolution to the exact evaluation of the partition function $p_k(n)$, systematically overcoming the limitations of traditional recursive and asymptotic methods. By framing the partition polytope $\mathcal{P}_{n,k}$…

Combinatorics · Mathematics 2026-03-17 Antonio Bonelli

Working in the context of symmetric spectra, we consider any higher algebraic structures that can be described as algebras over an operad O. We prove that the fundamental adjunction comparing O-algebra spectra with coalgebra spectra over…

Algebraic Topology · Mathematics 2015-07-24 Michael Ching , John E. Harper

Let $C$ be a comb-like curve over $\mathbb{C}$, and $E$ be a vector bundle of rank $n$ on $C$. In this paper, we investigate the criteria for the semistability of the restriction of $E$ onto the components of $C$ when $E$ is given to be…

Algebraic Geometry · Mathematics 2025-01-22 Suhas B. N. , Praveen Kumar Roy , Amit Kumar Singh

We develop a new general method for computing the decomposition type of the normal bundle to a projective rational curve. This method is then used to detect and explain an example of a Hilbert scheme that parametrizes all the rational…

Algebraic Geometry · Mathematics 2016-04-21 Alberto Alzati , Riccardo Re

We study topological recursion on the irregular spectral curve $xy^2-xy+1=0$, which produces a weighted count of dessins d'enfant. This analysis is then applied to topological recursion on the spectral curve $xy^2=1$, which takes the place…

Geometric Topology · Mathematics 2018-03-14 Norman Do , Paul Norbury

We explore a strong categorical correspondence between isomorphism classes of sheaves of arbitrary rank on a given algebraic curve and twisted pairs on another algebraic curve, mostly from a linear-algebraic standpoint. In a particular…

Algebraic Geometry · Mathematics 2025-07-28 Kuntal Banerjee , Steven Rayan

We introduce a novel class of explicit feature maps based on topological indices that represent each graph by a compact feature vector, enabling fast and interpretable graph classification. Using radial basis function kernels on these…

Machine Learning · Computer Science 2025-09-23 Adam Wesołowski , Ronin Wu , Karim Essafi

This paper investigates some issues arising in categorical models of reversible logic and computation. Our claim is that the structural (coherence) isomorphisms of these categorical models, although generally overlooked, have decidedly…

Category Theory · Mathematics 2013-04-29 Peter Hines

In this paper we prove that if S is a smooth, irreducible, projective, rational, complex surface and D an effective, connected, reduced divisor on S, then the pair (S,D) is contractible if the log-Kodaira dimension of the pair is $-\infty$.…

Algebraic Geometry · Mathematics 2016-11-10 Alberto Calabri , Ciro Ciliberto

Motivated by Simpson's conjecture on the motivicity of rigid irreducible connections, Esnault and Groechenig demonstrated that the mod-$p$ reductions of such connections on smooth projective varieties have nilpotent $p$-curvatures. In this…

Algebraic Geometry · Mathematics 2025-12-10 Pengfei Huang , Yichen Qin , Hao Sun