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We extend the flyping theorem to alternating links in thickened surfaces and alternating virtual links. The proof of the former result uses work of Boden--Karimi to adapt the author's geometric proof of Tait's 1898 flyping conjecture (first…

Geometric Topology · Mathematics 2024-08-30 Thomas Kindred

We establish a sharp upper estimate for the order of a canonical system in terms of the Hamiltonian. This upper estimate becomes an equality in the case of Krein strings. As an application we prove a conjecture of Valent about the order of…

Spectral Theory · Mathematics 2015-02-17 Roman Romanov

This write up attempts to clarify a preprint by Markarian [2] which proves This paper attempts to clarify a preprint of Markarian [2]. The preprint by Markarian [2] proves the relative Riemann-Roch theorem using a result describing how the…

Algebraic Geometry · Mathematics 2008-10-31 Ajay C. Ramadoss

At the light of recent results in literature we review a conjecture formulated in Math. Phys. Electron. J. 1 (1995), paper 5, 1--13, about the mechanism of breakdown of invariant sets in KAM problems and the identification of the dominant…

chao-dyn · Physics 2007-05-23 F. Bonetto , G. Gentile

The existence of a "Plastikstufe" for a contact structure implies the Weinstein conjecture for all supporting contact forms.

Symplectic Geometry · Mathematics 2010-03-03 Peter Albers , Helmut Hofer

The celebrated Mason's conjecture states that the sequence of independent set numbers of any matroid is log-concave, and even ultra log-concave. The strong form of Mason's conjecture was independently solved by Anari, Liu, Oveis Gharan and…

Combinatorics · Mathematics 2026-01-26 Shiqi Cao , Keyi Chen , Yitian Li , Yuxin Wu

In this article we prove that the Weinstein conjecture holds for contact manifolds $(\Sigma,\xi)$ for which $\mathrm{Cont}_0(\Sigma,\xi)$ is non-orderable in the sense of Eliashberg-Polterovich [EP00]. More precisely, we establish a link…

Symplectic Geometry · Mathematics 2015-12-23 Peter Albers , Urs Fuchs , Will J. Merry

In 2004, Choe, Oxley, Sokal and Wagner established a tight connection between matroids and multiaffine real stable polynomials. Recently, Branden used this theory and a polynomial coming from the Vamos matroid to disprove the generalized…

Combinatorics · Mathematics 2014-11-11 Sam Burton , Cynthia Vinzant , Yewon Youm

The DK conjecture of Bondal-Orlov and Kawamata states that there should be an embedding of bounded derived categories for any $K$-inequivalence, which is proved to be true for the toroidal case. In this paper, we construct examples of…

Algebraic Geometry · Mathematics 2024-10-22 Naichung Conan Leung , Ying Xie

The volume conjecture, formulated recently by H. Murakami and J. Murakami, is proved for the case of torus knots.

Geometric Topology · Mathematics 2007-05-23 R. M. Kashaev , O. Tirkkonen

The product version of the 1-2-3 Conjecture, introduced by Skowronek-Kazi{\'o}w in 2012, states that, a few obvious exceptions apart, all graphs can be 3-edge-labelled so that no two adjacent vertices get incident to the same product of…

Discrete Mathematics · Computer Science 2020-04-22 Julien Bensmail , Hervé Hocquard , Dimitri Lajou , Eric Sopena

In this paper we study the number of $k$-neighborly reorientations of an oriented matroid, leading to study $k$-Roudneff's conjecture, the case $k=1$ being the original statement conjectured in 1991. We first prove the conjecture for the…

Combinatorics · Mathematics 2025-12-02 Rangel Hernández , Luis Pedro Montejano

We establish a convenient necessary and sufficient condition for a multiaffine real polynomial to be stable, and use it to verify that the half-plane property holds for seven small matroids that resisted the efforts of Choe, Oxley, Sokal,…

Combinatorics · Mathematics 2007-09-11 David G. Wagner , Yehua Wei

Strassen's asymptotic rank conjecture [Progr. Math. 120 (1994)] claims a strong submultiplicative upper bound on the rank of a three-tensor obtained as an iterated Kronecker product of a constant-size base tensor. The conjecture, if true,…

Data Structures and Algorithms · Computer Science 2023-10-19 Andreas Björklund , Petteri Kaski

We provide a short proof of a conic version of the colorful Carath\'eodory theorem for oriented matroids. Holmsen's extension of the colorful Carath\'eodory theorem to oriented matroids (Advances in Mathematics, 2016) already encompasses…

Combinatorics · Mathematics 2025-09-26 Minho Cho , Seunghun Lee , Frédéric Meunier

In 1982-83, E. Nochka proved a conjecture of Cartan on defects of holomorphic curves in $\Bbb P^n$ relative to a possibly degenerate set of hyperplanes. This was further explained by W. Chen in his 1987 thesis, and subseqently simplified by…

Number Theory · Mathematics 2008-02-08 Paul Vojta

A strong version of the quantization conjecture of Guillemin and Sternberg is proved. For a reductive group action on a smooth, compact, polarized variety (X,L), the cohomologies of L over the GIT quotient X // G equal the invariant part of…

Algebraic Geometry · Mathematics 2007-05-23 Constantin Teleman

We prove that Witten's Conjecture [arXiv:hep-th/9411102] on the relationship between the Donaldson and Seiberg-Witten series for a four-manifold of Seiberg-Witten simple type with $b_1=0$ and odd $b_2^+\geq 3$ follows from our…

Differential Geometry · Mathematics 2016-04-08 Paul M. N. Feehan , Thomas G. Leness

The aim of this work is to prove a conjecture related to the Combinatorial Invariance Conjecture of Kazhdan-Lusztig polynomials, in the parabolic setting, for lower intervals in every arbitrary Coxeter group. This result improves and…

Combinatorics · Mathematics 2018-07-09 Mario Marietti

Reed Conjecture is open for more than 20 years now. Here we prove that Reed Conjecture is valid for (1) {P4UnionK1, Kite}-free graphs (2) {Chair, Kite}-free graphs (3) {K2UnionK2complement , H}-free graphs and (4) {2K2, M}-free graphs where…

Combinatorics · Mathematics 2019-09-16 Medha Dhurandhar