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We prove a generalization of Lopes's theorem, that is, of the converse of Brolin's theorem.

Dynamical Systems · Mathematics 2018-08-21 Yusuke Okuyama , Malgorzata Stawiska

We show that any space with a positive upper curvature bound has in a small neighborhood of any point a closely related metric with a negative upper curvature bound.

Differential Geometry · Mathematics 2019-10-14 Alexander Lytchak , Stephan Stadler

The bounded orbit conjecture says that every homeomorphism on the plane with each of its orbits being bounded must have a fixed point. Brouwer's translation theorem asserts that the conjecture is true for orientation preserving…

Dynamical Systems · Mathematics 2025-04-11 Jiehua Mai , Enhui Shi , Kesong Yan , Fanping Zeng

We perform generalizations of Witt and Virasoro algebras, and derive the corresponding Korteweg-de Vries equations from known R(p,q)-deformed quantum algebras previously introduced in J. Math. Phys. 51, 063518, (2010). Related relevant…

Mathematical Physics · Physics 2021-05-26 Mahouton Norbert Hounkonnou , Fridolin Melong , Melanija Mitrovic

This note introduces a special class of tuples of bounded operators on a Hilbert space. It is called the Agler Young class. Major results about this class include a Wold decomposition and a dilation theorem. The structure of the dilation is…

Functional Analysis · Mathematics 2018-09-25 Tirthankar Bhattacharyya , Subrata Shyam Roy , Tapesh Yadav

In this note I give a positive solution to Bullett's conjecture (posed in [1]) regarding a geometric presentation of the universal mod $p$ oriented ring spectrum.

Algebraic Topology · Mathematics 2024-04-30 Kiran Luecke

This paper contains a method to prove the existence of smooth curves in positive characteristic whose Jacobians have unusual Newton polygon. Using this method, I give a new proof that there exist supersingular curves of genus $4$ for every…

Number Theory · Mathematics 2024-09-11 Rachel Pries

We give a new construction of oriented manifolds having the boundary $\CC P^{2k+1}$ for each $k \geq 0$. The main tool is the theory of quasitoric manifolds.

Algebraic Topology · Mathematics 2018-04-24 Soumen Sarkar

We prove a generalization of the Poincar\'e-Birkhoff theorem for the open annulus showing that if a homeomorphism satisfies a certain twist condition and the nonwandering set is connected, then there is a fixed point. Our main focus is the…

Dynamical Systems · Mathematics 2007-05-23 David Richeson , Jim Wiseman

After a historical discussion of classical uniformisation results for Riemann surfaces, of problems appearing in higher dimensions, and of uniformisation results for projective manifolds with trivial or ample canonical bundle, we introduce…

Algebraic Geometry · Mathematics 2019-02-22 Daniel Greb , Stefan Kebekus , Behrouz Taji

A new proof of the decomposition theorem is established using a relation with a version of the local purity theorem of Deligne and Gabber adapted to complex algebraic varieties.

Algebraic Geometry · Mathematics 2013-12-03 Fouad Elzein , Lê Dung Trang

In this article we prove the explicit Mordell Conjecture for large families of curves. In addition, we introduce a method, of easy application, to compute all rational points on curves of quite general shape and increasing genus. The method…

Number Theory · Mathematics 2017-08-29 Sara Checcoli , Francesco Veneziano , Evelina Viada

Let $\rho: G \to \operatorname{GL}(V)$ be a rational representation of a reductive linear algebraic group $G$ defined over $\mathbb C$ on a finite dimensional complex vector space $V$. We show that, for any generic smooth (resp. $C^M$)…

Representation Theory · Mathematics 2012-03-19 Mark Losik , Peter W. Michor , Armin Rainer

We introduce a new partial resolution of crystalline spaces of Galois representations when the gaps in Hodge--Tate weights are smaller than $p$, with no bound on ramification. Furthermore, when $n =3$ in the case of minimal regular weight,…

Number Theory · Mathematics 2026-04-21 Robin Bartlett , Bao V. Le Hung , Brandon Levin

We prove new cases of Vojta's conjectures for surfaces in the context of function fields, with truncation equal to one and providing an effective explicit description of the exceptional set. We also prove a general and explicit result…

Number Theory · Mathematics 2022-03-02 Natalia Garcia-Fritz

The relationship between $L_p$ affine surface area and curvature measures is investigated. As a result, a new representation of the existing notion of $L_p$ affine surface area depending only on curvature measures is derived. Direct proofs…

Metric Geometry · Mathematics 2015-09-21 Yiming Zhao

We relate the total curvature and the isoperimetric deficit of a curve $\gamma$ in a two-dimensional space of constant curvature with the area enclosed by the evolute of $\gamma$. We provide also a Gauss-Bonnet theorem for a special class…

Differential Geometry · Mathematics 2014-03-14 Julià Cufí , Agustí Reventós

We prove a uniform version of a finiteness conjecture due to Rasmussen and Tamagawa in the case of CM abelian varieties. This extends recent results concerning CM elliptic curves to CM abelian varieties of arbitrary dimension.

Number Theory · Mathematics 2015-12-01 Davide Lombardo

We prove the Dynamical Andr\'e-Oort (DAO) conjecture proposed by Baker and DeMarco for families of rational maps parameterized by an algebraic curve. In fact, we prove a stronger result, which is a Bogomolov type generalization of DAO for…

Dynamical Systems · Mathematics 2023-09-28 Zhuchao Ji , Junyi Xie

In this very short note, we give a counterexample to a recent conjecture of Gilmer which would have implied the union-closed conjecture.

Combinatorics · Mathematics 2022-11-23 David Ellis