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Recently, in [18] the authors gave some results on the structure, capability and the Schur multiplier of generalized Heisenberg Lie superalgebra. In this work we try to extend these concepts to the case of generalized Heisenberg Lie…

Rings and Algebras · Mathematics 2020-05-15 Rudra Narayan Padhan , K. C Pati

Motivated by applications in moduli theory, we introduce a flexible and powerful language for expressing lower bounds on relative dimension of morphisms of schemes, and more generally of algebraic stacks. We show that the theory is robust…

Algebraic Geometry · Mathematics 2013-05-29 Brian Osserman

We prove new bounds on the dimensions of distance sets and pinned distance sets of planar sets. Among other results, we show that if $A\subset\mathbb{R}^2$ is a Borel set of Hausdorff dimension $s>1$, then its distance set has Hausdorff…

Classical Analysis and ODEs · Mathematics 2019-12-17 Tamás Keleti , Pablo Shmerkin

We calculate the measure and Hausdorff dimension of sets of matrices over fields of formal power series with good approximation properties for a restricted set of denominators.

Number Theory · Mathematics 2007-05-23 Simon Kristensen

We present an innovative approach to dimensional analysis, based on a general representation theorem for complete quantity functions admitting a covariant scalar representation; this theorem is in turn grounded in a purely algebraic theory…

Mathematical Physics · Physics 2020-12-15 Dan Jonsson

The aim of this paper is to extend basic understanding of Engel structures through developing geometric constructions which are canonical to a certain degree and the dynamics of Cauchy characteristics in the transverse spaces which may…

Differential Geometry · Mathematics 2018-04-26 Yoshihiko Mitsumatsu

This is a survey on formality results relying on weight structures. A weight structure is a naturally occurring grading on certain differential graded algebras. If this weight satisfies a purity property, one can deduce formality. Algebraic…

Algebraic Topology · Mathematics 2024-06-28 Coline Emprin , Geoffroy Horel

We generalize the concept of a field by allowing addition to be a partial operation. We show that elements of such a "partially additive field" share many similarities with physical quantities. In particular, they form subsets of mutually…

Mathematical Physics · Physics 2025-02-04 Georgy Alymov

In this paper, we prove a structure theorem for the infinite union of $n$-adic doubling measures via techniques which involve far numbers. Our approach extends the results of Wu in 1998, and as a by product, we also prove a classification…

Classical Analysis and ODEs · Mathematics 2021-01-20 Theresa C. Anderson , Bingyang Hu

We review how an algebraic formulation for the dynamics of a physical system allows to describe a reduction procedure for both classical and quantum evolutions.

Mathematical Physics · Physics 2021-09-22 Giuseppe Marmo , Alessandro Zampini

We show that for generalized Baker's transformations there is a parameter domain where we have an absolutely continuous ergodic measure and in direct neighborhood there is a parameter domain where not even the variational principle for…

Dynamical Systems · Mathematics 2018-07-25 Jörg Neunhäuserer

In some scientific fields, a scaling is able to modify the topology of an observed object. Our goal in the present work is to introduce a new formalism adapted to the mathematical representation of this kind of phenomenon. To this end, we…

Geometric Topology · Mathematics 2008-12-11 Guy Wallet

We introduce a family of piecewise isometries. This family is similar to the ones studied by Hooper and Schwartz. We prove that a renormalization scheme exists inside this family and compute the Hausdorff dimension of the discontinuity set.…

Dynamical Systems · Mathematics 2018-08-28 Nicolas Bédaride , Jean-François Bertazzon

This paper extends some results of [M5] and [M3], in particular, removing assumptions of positive lower density. We give conditions on a general family $P_{\lambda}:\mathbb{R}^{n}\to\mathbb{R}^{m}, \lambda \in \Lambda,$ of orthogonal…

Classical Analysis and ODEs · Mathematics 2023-10-12 Pertti Mattila

Some notions of algebraic geometry can be defined for arbitrary varieties of algebras. This leads to universal algebraic geometry. The main idea of the presented theory is to consider interactions between algebra, logic and geometry in…

General Mathematics · Mathematics 2007-05-23 Boris Plotkin

The goal of this article is to survey recent developments in the theory of contact structures in dimension three.

Geometric Topology · Mathematics 2007-05-23 Ko Honda

The purpose of this paper is to study the structure and the algebraic varieties of Hom-associative algebras. We give characterize multiplicative simple Hom-associative algebras and show some examples deforming the $2\times 2$-matrix algebra…

Rings and Algebras · Mathematics 2019-06-13 Ahmed Zahari , Abdenacer Makhlouf

In this paper we show that the Hausdorff dimension of the set of singular pairs is 4/3. We also show that the action of diag(e^t,e^t,e^{-2t}) on SL(3,R)/SL(3,Z) admits divergent trajectories that exit to infinity at arbitrarily slow…

Dynamical Systems · Mathematics 2008-10-22 Yitwah Cheung

We develop a new framework of relative algebroids to address existence and classification problems of geometric structures subject to partial differential equations.

Differential Geometry · Mathematics 2025-03-26 Rui Loja Fernandes , Wilmer Smilde

The purpose of this note is to discuss examples of geometric transition from hyperbolic structures to half-pipe and Anti-de Sitter structures in dimensions two, three and four. As a warm-up, explicit examples of transition to Euclidean and…

Geometric Topology · Mathematics 2021-06-23 Andrea Seppi