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Contact Geometry is an odd dimensional analogue of Symplectic Geometry. This vague idea can actually be formalized in a rather precise way by means of a Symplectic-to-Contact Dictionary. The aim of this review paper is discussing the basic…

Differential Geometry · Mathematics 2026-02-02 Fabrizio Pugliese , Giovanni Sparano , Luca Vitagliano

We prove the integral Hodge conjecture for all 3-folds X of Kodaira dimension zero with H^0(X, K_X) not zero. This generalizes earlier results of Voisin and Grabowski. The assumption is sharp, in view of counterexamples by Benoist and…

Algebraic Geometry · Mathematics 2023-06-22 Burt Totaro

In this article, we first give a proof on the Arnold chord conjecture which states that every Reeb flow has at least as many Reeb chords as a smooth function on the Legendre submanifold has critical points on contact manifold. Second, we…

General Mathematics · Mathematics 2013-09-27 Renyi Ma

The Bombieri-Dwork conjecture predicts that the differential equations satisfied by $G$-functions come from geometry. In this paper, we will look at special $G$-functions whose differential equations have a special singularity with…

Number Theory · Mathematics 2019-12-03 Wenzhe Yang

We introduce the notion of K-correspondence, and show that many Calabi-Yau varieties carry a lot of self-K-isocorrespondences, which furthermore satisfy the property of multiplying the canonical volume form by a constant of modulus…

Algebraic Geometry · Mathematics 2007-05-23 Claire Voisin

We prove that any weakly symplectically fillable contact manifold is tight. Furthermore we verify the strong Weinstein conjecture for contact manifolds that appear as the concave boundary of a directed symplectic cobordism whose positive…

Symplectic Geometry · Mathematics 2025-04-29 Wolfgang Schmaltz , Stefan Suhr , Kai Zehmisch

In this paper we study three-dimensional orbifolds by 2-groups with a trivially-acting one-form symmetry group BK. These orbifolds have a global two-form symmetry, and so one expects that they decompose into (are equivalent to) a disjoint…

High Energy Physics - Theory · Physics 2022-09-07 T. Pantev , D. Robbins , E. Sharpe , T. Vandermeulen

Firstly we show a generalization of the (1,1)-Lefschetz theorem for projective toric orbifolds and secondly we prove that on 2k-dimensional quasi-smooth hypersurfaces coming from quasi-smooth intersection surfaces, under the Cayley trick,…

Algebraic Geometry · Mathematics 2023-02-09 William D. Montoya

For a number field $k$ and an odd prime $p$, let $\tilde{k}$ be the compositum of all the ${\mathbb Z}_p$-extensions of $k$, $\tilde{\Lambda }$ the associated Iwasawa algebra, and $X(\tilde{k})$ the Galois group over $\tilde{k}$ of the…

Number Theory · Mathematics 2025-05-13 Thong Nguyen Quang Do

The concept of Gorenstein dimension, defined by Auslander and Bridger for finitely generated modules over a Noetherian ring, is studied in the context of finitely presented modules over a coherent ring. A generalization of the…

Commutative Algebra · Mathematics 2009-02-09 Livia Hummel , Thomas Marley

Using orbifold metrics of the appropriately signed Ricci curvature on orbifolds with negative or numerically trivial canonical bundle and the two-dimensional Log Minimal Model Program, we prove that the fundamental group of special compact…

Algebraic Geometry · Mathematics 2014-10-13 Frédéric Campana , Benoît Claudon

In this paper, we develop the method of circle of partitions and associated statistics. As an application we prove conditionally the binary Goldbach conjecture. We develop a series of steps to prove the binary Goldbach conjecture in full.…

Number Theory · Mathematics 2026-03-16 Theophilus Agama

The conjecture of Kosniowski asserts that if the circle acts on a compact unitary manifold $M$ with a non-empty fixed point set and $M$ does not bound a unitary manifold equivariantly, then the dimension of the manifold is bounded above by…

Differential Geometry · Mathematics 2019-01-01 Donghoon Jang

Manifolds all of whose geodesics are closed have been studied a lot, but there are only few examples known. The situation is different if one allows in addition for orbifold singularities. We show, nevertheless, that the abundance of new…

Differential Geometry · Mathematics 2018-11-27 Manual Amann , Christian Lange , Marco Radeschi

We solve several open problems concerning integer points of polytopes arising in symplectic and algebraic geometry. In this direction we give the first proof of a broad case of Ewald's Conjecture (1988) concerning symmetric integral points…

Combinatorics · Mathematics 2026-04-13 Luis Crespo , Álvaro Pelayo , Francisco Santos

In [19], a general Dabrowski-Sitarz-Zalecki type theorem for odd dimensional manifolds with boundary was proved. In this paper, we give the proof of the another general Dabrowski-Sitarz-Zalecki type theorem for the spectral Einstein…

Differential Geometry · Mathematics 2023-12-04 Hongfeng Li , Yong Wang

We classify simply connected compact Sasaki manifolds of dimension $2n+1$ with positive transverse bisectional curvature. In particular, the K\"ahler cone corresponding to such manifolds must be bi-holomorphic to $\C^{n+1}\backslash \{0\}$.…

Differential Geometry · Mathematics 2016-03-07 Weiyong He , Song Sun

Let $\mathrm{IG}(k, 2n+1)$ be the odd-symplectic Grassmannian. Property $\mathcal{O}$, introduced by Galkin, Golyshev and Iritani for arbitrary complex, Fano manifolds $X$, is a statement about the eigenvalues of the linear operator…

Algebraic Geometry · Mathematics 2019-07-03 Changzheng Li , Leonardo C. Mihalcea , Ryan Shifler

We give a new proof of the Hodge conjecture for abelian fourfolds of Weil type with discriminant 1 and all of their powers. The Hodge conjecture for these abelian fourfolds was proven by Markman using hyperholomorphic sheaves on…

Algebraic Geometry · Mathematics 2026-02-11 Salvatore Floccari , Lie Fu

By creating a new method, the author proved the well-known world's baffling problems Goldbach conjecture, twin primes conjecture, the Proposition (C) and the Proposition $n^2+1$.

General Mathematics · Mathematics 2007-05-23 Kaida Shi
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