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In this paper, we prove the global rigidity of sphere packings on 3-dimensional manifolds. This is a 3-dimensional analogue of the rigidity theorem of Andreev-Thurston and was conjectured by Cooper and Rivin. We also prove a global rigidity…

几何拓扑 · 数学 2018-12-31 Xu Xu

We prove finiteness results for sets of varieties over number fields with good reduction outside a given finite set of places using cyclic covers. We obtain a version of the Shafarevich conjecture for weighted projective surfaces, double…

代数几何 · 数学 2022-07-26 Ariyan Javanpeykar , Daniel Loughran , Siddharth Mathur

We prove the conjecture by Diaconis and Eriksson (2006) that the Markov degree of the Birkhoff model is three. In fact, we prove the conjecture in a generalization of the Birkhoff model, where each voter is asked to rank a fixed number, say…

统计理论 · 数学 2014-07-09 Takashi Yamaguchi , Mitsunori Ogawa , Akimichi Takemura

We show that the Friedlander-Mazur conjecture holds for a complex smooth projective variety X of dimension three implies the standard conjectures hold for X. This together with a result of Friedlander yields the equivalence of the two…

代数几何 · 数学 2021-11-05 Jin Cao , Wenchuan Hu

We formulate and prove an analog of the Hopf Index Theorem for Riemannian foliations. We compute the basic Euler characteristic of a closed Riemannian manifold as a sum of indices of a non-degenerate basic vector field at critical leaf…

微分几何 · 数学 2021-01-28 Victor Belfi , Efton Park , Ken Richardson

Following a method introduced by Thomas-Vasquez and developed by Grundman, we prove that many Hilbert modular threefolds of arithmetic genus $0$ and $1$ are of general type, and that some are of nonnegative Kodaira dimension. The new…

数论 · 数学 2026-04-20 Adam Logan

We consider Guth's approach to the Fourier restriction problem via polynomial partitioning. By writing out his induction argument as a recursive algorithm and introducing new geometric information, known as the polynomial Wolff axioms, we…

经典分析与常微分方程 · 数学 2019-09-26 Jonathan Hickman , Keith M. Rogers

In this paper we prove Conjecture \ref{conj1} for a set of representations of the group $GL_n({\bf A})$. This Conjecture is stated in complete generality as Conjecture 1 in \cite{G2}, and here we prove it for various cases. See Conjecture…

数论 · 数学 2016-09-20 David Ginzburg

We formulate Vojta's conjecture for smooth weighted projective varieties, weighted multiplier ideal sheaves, and weighted log pairs and prove that all three versions of the conjecture are equivalent. In the process, we introduce generalized…

代数几何 · 数学 2025-11-19 Sajad Salami , Tony Shaska

In this article, we first describe codimension two regular foliations with numerically trivial canonical class on complex projective manifolds whose canonical class is not numerically effective. Building on a recent algebraicity criterion…

代数几何 · 数学 2023-06-22 Stéphane Druel

This paper contributes to the proof of the conjecture posed in arXiv:1606.02521, stating that a Nichols algebra of diagonal type with finite Gelfand-Kirillov dimension has finite (generalized) root system. We prove the conjecture assuming…

量子代数 · 数学 2021-06-21 Iván Angiono , Agustín García Iglesias

We study some conjectures about Chow groups of varieties of geometric genus one. Some examples are given of Calabi-Yau threefolds where these conjectures can be verified, using the theory of finite-dimensional motives.

代数几何 · 数学 2016-02-17 Robert Laterveer

We prove a conjecture of the first-named author ([J14]) on the upper bound Fourier coefficients of automorphic forms in Arthur packets of all classical groups over any number field. This conjecture generalizes the global version of the…

数论 · 数学 2022-01-03 Dihua Jiang , Baiying Liu

We compute the arc index of an adequate link and establish bounds on the arc index of the closure of a positive 3-braid. We also conjecture an inequality between the crossing number, arc index, and Turaev genus of a link and show the…

几何拓扑 · 数学 2026-05-12 Álvaro Del Valle Vílchez , Adam M. Lowrance

We prove Wilking's Conjecture about the completeness of dual leaves for the case of Riemannian foliations on nonnegatively curved symmetric spaces. Moreover, we conclude that such foliations split as a product of trivial foliations and a…

微分几何 · 数学 2020-06-30 Renato J. M. e Silva , Llohann D. Sperança

We fix some gaps of a proof of Xiao's conjecture on canonically fibered surfaces of relative genus 5 by the second author. Our argument simplifies the original proof and gives a much better bound on the geometric genus of the surface. Also…

代数几何 · 数学 2025-06-03 Houari Benammar Ammar , Xi Chen , Nathan Grieve

After fixing a triangulation $L$ of a $k$-dimensional simplex that has no new vertices on the boundary, we introduce a triangulation operation on all simplicial complexes that replaces every $k$-face with a copy of $L$, via a sequence of…

组合数学 · 数学 2015-10-21 Gábor Hetyei , Eran Nevo

We obtain an explicit expression for the number of ramified coverings of the sphere by the torus with given ramification type for a small number of ramification points, and conjecture this to be true for an arbitrary number of ramification…

代数几何 · 数学 2007-05-23 P. P. Goulden , D. M. Jackson , A. Vainshtein

Gross, Mansour and Tucker introduced the partial-dual orientable genus polynomial and the partial-dual Euler genus polynomial. They computed these two partial-dual genus polynomials of four families of ribbon graphs, posed some research…

组合数学 · 数学 2020-06-30 Qi Yan , Xian'an Jin

We study the "one and one-half" dimensional Vlasov-Maxwell-Fokker-Planck system and obtain the first results concerning well-posedness of solutions. Specifically, we prove the global-in-time existence and uniqueness in the large of…

偏微分方程分析 · 数学 2017-01-31 Stephen Pankavich , Jack Schaeffer