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In this survey we collect some recent advances concerning embedding theorems in analytic and harmonic function spaces of several variables in various domains in $C^n.$ Some sharp embedding results presented in this survey paper extend sharp…

Complex Variables · Mathematics 2025-08-28 R. F. Shamoyan , M. G. Bashmakova

We extend the Jacobi structure from $TQ\times \mathbb{R}$ and $T^{*}Q \times \mathbb{R}$ to $A\times \mathbb{R}$ and $A^{*}\times \mathbb{R}$, respectively, where $A$ is a Lie algebroid and $A^{*}$ carries the associated Poisson structure.…

Mathematical Physics · Physics 2023-06-13 Alexandre Anahory Simoes , Leonardo Colombo , Manuel de Leon , Modesto Salgado , Silvia Souto

Let $\theta$ and $\theta'$ be a pair of exceptional representations in the sense of Kazhdan and Patterson [KP], of a metaplectic double cover of $GL_n$. The tensor $\theta\otimes\theta'$ is a (very large) representation of $GL_n$. We…

Representation Theory · Mathematics 2015-02-25 Eyal Kaplan

This paper proves the following converse to a theorem of Mumford: Let $A$ be a principally polarized abelian variety of dimension five, whose theta divisor has a unique singular point, and suppose that the multiplicity of the singular point…

Algebraic Geometry · Mathematics 2015-03-12 Sebastian Casalaina-Martin , Robert Friedman

Given a smooth polarized Riemann surface (X, L) endowed with a hyperbolic metric $\omega$ with cusp singularities along a divisor D, we show the L^2 projective embedding of (X, D) defined by L^k is asymptotically almost balanced in a…

Differential Geometry · Mathematics 2017-09-26 Jingzhou Sun , Song Sun

In this paper new classes of $L_2$-orthogonal functions are constructed as iterated $L_2$-orthogonal systems. In order to do this we use the theory of the Riemann's zeta-function as well as our theory of Jacob's ladders. The main result is…

Classical Analysis and ODEs · Mathematics 2021-04-27 Jan Moser

If a symmetric multilinear algebra is weakly nil, then it is Engel. This result may be regarded as an infinite-dimensional analogue of the well-known Jacobian theorem, which states that if a polynomial mapping has a polynomial inverse, then…

Rings and Algebras · Mathematics 2025-10-03 Dmitri Piontkovski

We compute the subgroup of the monodromy group of a generalized Kummer variety associated to equivalences of derived categories of abelian surfaces. The result was previously announced in arXiv:1201.0031. Mongardi showed that the subgroup…

Algebraic Geometry · Mathematics 2024-10-29 Eyal Markman

There are two canonical projective structures on any compact Riemann surface of genus at least two: one coming from the uniformization theorem, and the other from Hodge theory. They produce two (different) families of projective structures…

Algebraic Geometry · Mathematics 2024-08-19 Indranil Biswas , Alessandro Ghigi , Carolina Tamborini

Using divisors, an analog of the Jacobian for a compact connected nonorientable Klein surface $Y$ is constructed. The Jacobian is identified with the dual of the space of all harmonic real one-forms on $Y$ quotiented by the torsion-free…

Algebraic Geometry · Mathematics 2007-05-23 Pablo Ares-Gastesi , Indranil Biswas

This short note investigates the compact embedding of degenerate matrix weighted Sobolev spaces into weighted Lebesgue spaces. The Sobolev spaces explored are defined as the abstract completion of Lipschitz functions in a bounded domain…

Analysis of PDEs · Mathematics 2019-08-16 Dario D. Monticelli , Scott Rodney

We define the Jacobian of a Riemann surface with analytically parametrized boundary components. These Jacobians belong to a moduli space of ``open abelian varieties'' which satisfies gluing axioms similar to those of Riemann surfaces, and…

Algebraic Geometry · Mathematics 2008-06-17 Thomas M. Fiore , Igor Kriz

The Torelli theorem establishes that the Jacobian of a smooth projective curve, together with the polarization provided by the theta divisor, fully characterizes the curve. In the case of nodal curves, there exists a concept known as fine…

Combinatorics · Mathematics 2025-02-05 Alex Abreu , Marco Pacini

Let $X/\mathbb{F}_{q}$ be a smooth geometrically connected variety. Inspired by work of Corlette-Simpson over $\mathbb{C}$, we formulate a conjecture that absolutely irreducible rank 2 local systems with infinite monodromy on $X$ come from…

Algebraic Geometry · Mathematics 2021-06-25 Raju Krishnamoorthy , Ambrus Pál

The purpose of this paper is to show how the generic vanishing theorems of M. Green and the second author can be used to settle several questions and conjectures concerning the geometry of irregular complex projective varieties. First, we…

alg-geom · Mathematics 2008-02-03 Lawrence Ein , Robert Lazarsfeld

In this article, we study the weak and strong Lefschetz properties, and the related notion of almost revlex ideal, in the non-Artinian case, proving that several results known in the Artinian case hold also in this more general setting. We…

Combinatorics · Mathematics 2020-04-03 Elisa Palezzato , Michele Torielli

We characterize decomposable principally polarized abelian varieties of the form $E\times B$, with $E$ an elliptic curve, in two different ways, which are, surprisingly, completely analogous to classical results of curve theory concerning…

Algebraic Geometry · Mathematics 2026-05-11 Nelson Alvarado , Giuseppe Pareschi

By considering the projectivized spectrum of the Jacobi operator, we introduce the concept of projective Osserman manifold in both the affine and in the pseudo-Riemannian settings. If M is an affine projective Osserman manifold, then the…

Differential Geometry · Mathematics 2015-06-15 Peter Gilkey , Stana Nikcevic

We study the orchard problem on cubic surfaces. We classify possibly reducible cubic surfaces $X\subseteq \mathbb{P}^3(\C)$ with smooth components on which there exist families of finite sets (of unbounded size) with quadratically many…

Logic · Mathematics 2025-11-03 Martin Bays , Jan Dobrowolski , Tingxiang Zou

Given a curve defined over an algebraically closed field which is complete with respect to a nontrivial valuation, we study its tropical Jacobian. This is done by first tropicalizing the curve, and then computing the Jacobian of the…

Algebraic Geometry · Mathematics 2017-01-13 Barbara Bolognese , Madeline Brandt , Lynn Chua