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We prove a generalization of the classical Poincar\'e--Birkhoff theorem for Liouville domains, in arbitrary even dimensions. This is inspired by the existence of global hypersurfaces of section for the spatial case of the restricted…

Symplectic Geometry · Mathematics 2021-05-14 Agustin Moreno , Otto van Koert

We introduce the notions of strong local Torelli and T-class for polarized manifolds, and prove that strong local Torelli implies global Torelli theorem on the Torelli spaces for polarized manifolds in the T-class. We discuss many new…

Algebraic Geometry · Mathematics 2016-09-06 Kefeng Liu , Yang Shen

In recent work by Alessandro Fonda, a generalization of the parallelogram law in any dimension $N\geq 2$ was given by considering the ratio of the quadratic mean of the measures of the $N-1$-dimensional diagonals to the quadratic mean of…

Metric Geometry · Mathematics 2019-10-16 Antonio M. Oller-Marcén

We extend the original cylinder conjecture on point sets in affine three-dimensional space to the more general framework of divisible linear codes over $\mathbb{F}_q$ and their classification. Through a mix of linear programming,…

Combinatorics · Mathematics 2021-12-14 Sascha Kurz , Sam Mattheus

We discuss the proof of a certain integral theorem obtained by C. G. Cullen, originally stated on the class of the analytic intrinsic functions on the quaternions. It is shown that this integral theorem is true for a larger class of…

Complex Variables · Mathematics 2010-09-22 Daniel Alayon-Solarz

We generalize and prove a result which was first shown by Zippin, and was explicitly formulated by Benyamini.

Functional Analysis · Mathematics 2017-05-31 Petr Hajek , Thomas Schlumprecht , Andras Zsak

A wide class of physical distributions appears to follow the q-Gaussian form, which plays the role of attractor according to a Central Limit Theorem generalized in the presence of specific correlations between the relevant random variables.…

Mathematical Physics · Physics 2015-03-17 M. Jauregui , C. Tsallis

We discuss some variants of cone theorem for movable curves in any codimensions.

Algebraic Geometry · Mathematics 2020-02-26 Sung Rak Choi , Yoshinori Gongyo

In this article, we prove that a general version of Alladi's formula with Dirichlet convolution holds for arithmetical semigroups satisfying Axiom $A$ or Axiom $A^{\#}$. As applications, we apply our main results to certain semigroups…

Number Theory · Mathematics 2022-02-17 Lian Duan , Ning Ma , Shaoyun Yi

We establish a real version of Turrittin's result on polynomial and formal normal forms of linear systems of ODEs with meromorphic coefficients. Both the normal forms or the transformations used have only real coefficients. In order to…

Classical Analysis and ODEs · Mathematics 2023-05-16 Moulay Barkatou , Félix Álvaro Carnicero-Martín , Fernando Sanz Sánchez

We propose a new integral based on Taylor measures, study its properties extensively, and we illustrate that it includes many concepts from mathematics as special cases. In particular, the new integral emerges as a generalization of the…

General Mathematics · Mathematics 2026-05-11 Athanasios Christou Micheas

In this article we give a totally new proof of the integral localization formula for equivariantly closed differential forms (Theorem 7.11 in [BGV]). We restate it here as Theorem 2. This localization formula is very well known, but the…

Differential Geometry · Mathematics 2007-05-23 Matvei Libine

"V - E + F = 2", the famous Euler's polyhedral formula, has a natural generalization to convex polytopes in every finite dimension, also known as the Euler-Poincar\'e Formula. We provide another short inductive proof of the general formula.…

Metric Geometry · Mathematics 2021-09-10 Petr Hliněný

In every dimension $d \geq 2$, we give an explicit formula that expresses the values of any Schwartz function on $\mathbb{R}^d$ only in terms of its restrictions, and the restrictions of its Fourier transform, to all origin-centered spheres…

Number Theory · Mathematics 2021-10-28 Martin Stoller

An infinite dimensional algebra, which is useful for deriving exact solutions of the generalized pairing problem, is introduced. A formalism for diagonalizing the corresponding Hamiltonian is also proposed. The theory is illustrated with…

Quantum Physics · Physics 2008-02-03 Feng Pan , J. P. Draayer

The aim of this paper is to present some fixed point theorems for generalized contractions by altering distance functions in a complete cone metric spaces endowed with a partial order. We also generalize fixed point theorems of J. Harjani,…

Functional Analysis · Mathematics 2012-05-31 Mehdi Asadi , Hossein Soleimani

We prove the Hardy-Littlewood theorem in two dimensions for functions whose Fourier coefficients obey general monotonicity conditions and, importantly, are not necessarily positive. The sharpness of the result is given by a counterexample,…

Classical Analysis and ODEs · Mathematics 2023-10-06 Kristina Oganesyan

In this paper, we successfully set up a generalized sphere theorem for compact Riemannian manifolds with radial Ricci curvature bounded.

Differential Geometry · Mathematics 2025-06-03 Jing Mao

I give a simpler proof of the generalisation of Engel's Theorem to Leibniz algebras.

Rings and Algebras · Mathematics 2011-07-12 Donald W. Barnes

The Implicit and Inverse Function Theorems are special cases of a general Implicit/Inverse Function Theorem which can be easily derived from either theorem. The theorems can thus be easily deduced from each other via the generalized…

Classical Analysis and ODEs · Mathematics 2015-10-09 Bruce Blackadar