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The purpose of this article is twofold. The first is to prove a second main theorem for meromorphic mappings of $\C^m$ into a complex projective variety intersecting hypersurfaces in subgeneral position with truncated counting functions.…

Complex Variables · Mathematics 2023-08-01 Si Duc Quang

In this paper, we give a new proof of an arithmetic analogue of the Riemann-Roch Theorem, due originally to Serge Lang. Lang's result was first proved using the lattice point geometry of Minkowski. By contrast, our proof is completely…

Number Theory · Mathematics 2014-10-30 Sam Mundy

The possibility of reversion of the inequality in the Second Main Theorem of Cartan in the theory of holomorphic curves in projective space is discussed. A new version of this theorem is proved that becomes an asymptotic equality for a…

Complex Variables · Mathematics 2015-03-09 Alexandre Eremenko

We show the smoothness of weakly Dirac-harmonic maps from a closed spin Riemann surface into stationary Lorentzian manifolds, and obtain a regularity theorem for a class of critical elliptic systems without anti-symmetry structures.

Analysis of PDEs · Mathematics 2020-03-31 Wanjun Ai , Miaomiao Zhu

Using the Dieudonne theory we will study a reduction of an abelian variety of complex multiplication. Our results may be regarded as a generalization of a classical theorem due to Deuring for a CM-elliptic curve. We will also discuss a…

Number Theory · Mathematics 2013-10-16 Ken-ichi Sugiyama

We generalize the following result of White: Suppose $N$ is a compact, strictly convex domain in $\RR^3$ with smooth boundary. Let $\Sigma$ be a compact 2-manifold with boundary. Then a generic smooth curve $\Gamma\cong \partial\Sigma$ in…

Differential Geometry · Mathematics 2009-05-18 David Hoffman , Brian White

Let E/K be an elliptic curve with complex multiplication and let $K^{ab}$ be the Abelian closure of $K$. We prove in this article that there exists a constant $c(E/K)$ such that : for all point $P\in E(\bar{K})-E_{tors}$, we have…

Number Theory · Mathematics 2007-05-23 Nicolas Ratazzi

In this paper we study variations of the Hopf theorem concerning continuous maps $f$ of a compact Riemannian manifold $M$ of dimension $n$ to $\mathbb{R}^n$. We investigate the case when $M$ is a closed convex $n$-dimensional surface and…

Metric Geometry · Mathematics 2025-04-22 I. M. Shirokov

We study Hardy classes on the disk associated to the equation $\bar\d w=\alpha\bar w$ for $\alpha\in L^r$ with $2\leq r<\infty$. The paper seems to be the first to deal with the case $r=2$. We prove an analog of the M.~Riesz theorem and a…

Analysis of PDEs · Mathematics 2015-03-20 Laurent Baratchart , Alexander Borichev , Slah Chaabi

We show that two smooth projective curves C_1 and C_2 of genus g which have isomorphic symmetric products are isomorphic unless g=2. This extends a theorem of Martens.

Algebraic Geometry · Mathematics 2021-09-28 Najmuddin Fakhruddin

We prove that Allard's regularity theorem holds for rectifiable $n$-dimensional varifolds $V$ assuming a weaker condition on the first variation. This, in the special case when $V$ is a smooth manifold translates to the following: If…

Analysis of PDEs · Mathematics 2013-11-18 Theodora Bourni , Alexander Volkmann

A short proof of the elliptical range theorem concerning the numerical range of $2\times2$ complex matrices is given.

Spectral Theory · Mathematics 2022-11-24 Gyula Lakos

It is proved that the rank of an elliptic curve is one less the arithmetic complexity of the corresponding non-commutative torus. As an illustration, we consider a family of elliptic curves with complex multiplication.

Number Theory · Mathematics 2023-03-24 Igor V. Nikolaev

We prove that if $C$ is a reflexive smooth plane curve of degree $d$ defined over a finite field $\mathbb{F}_q$ with $d\leq q+1$, then there is an $\mathbb{F}_q$-line $L$ that intersects $C$ transversely. We also prove the same result for…

Algebraic Geometry · Mathematics 2019-08-15 Shamil Asgarli

The stable reduction theorem says that a family of curves of genus $g\geq 2$ over a punctured curve can be uniquely completed (after possible base change) by inserting certain stable curves at the punctures. We give a new proof of this…

Differential Geometry · Mathematics 2020-09-30 Jian Song , Jacob Sturm , Xiaowei Wang

A convergence theorem for martingales with c\`adl\`ag trajectories (right continuous with left limits everywhere) is obtained in the sense of the weak dual topology on Hilbert space, under conditions that are much weaker than those required…

Probability · Mathematics 2024-10-08 Bruno N. Remillard , Jean Vaillancourt

We provide proofs of the following theorems by considering the entropy of random walks: Theorem 1.(Alon, Hoory and Linial) Let G be an undirected simple graph with n vertices, girth g, minimum degree at least 2 and average degree d: Odd…

Discrete Mathematics · Computer Science 2010-11-05 S. Ajesh Babu , Jaikumar Radhakrishnan

In non-Euclidean geometry, there are several known correspondings to Chapple-Euler Theorem. This remark shows that those results yield expressions corredponding to the well-known formula $d=\sqrt{R(R-2r)}$.

Metric Geometry · Mathematics 2021-01-06 Takeo Noda , Shin-ichi Yasutomi

In this paper we consider a generalized version of Carleman's inequality. An equivalent version of it states that $\|f\|_{A_\alpha^{2\alpha}}\leq\|f\|_{H^2}$, where $f$ is a holomorphic function and $\alpha>1$. If the norms…

Functional Analysis · Mathematics 2019-08-06 Hui Dan , Kunyu Guo , Yi Wang

In this paper we study the asymptotic behaviour under dilations of probability measures supported on polynomial curves in nilmanifolds. We prove, under some mild conditions, effective equidistribution of such measures to the Haar measure.…

Dynamical Systems · Mathematics 2008-12-02 Michael Björklund , Alexander Fish