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We study generalized sums of linear orders. These are binary operations that, given linear orders $A$ and $B$, return an order $A \oplus B$ that can be decomposed as an isomorphic copy of $A$ interleaved with a copy of $B$. We show that…

Logic · Mathematics 2025-12-17 Álvaro Díaz Ramos , Garrett Ervin , Saharon Shelah

In planar algebras, we show how to project certain simple "quadratic" tangles onto the linear space spanned by "linear" and "constant" tangles. We obtain some corollaries about the principal graphs and annular structure of subfactors.

Operator Algebras · Mathematics 2019-12-19 Vaughan F. R. Jones

By using the representational power of Chu spaces we define the notion of a generalized topological space (or GTS, for short), i.e., a mathematical structure that generalizes the notion of a topological space. We demonstrate that these…

Logic in Computer Science · Computer Science 2011-01-18 Basil K. Papadopoulos , Apostolos Syropoulos

Sufficient conditions for the well-posedness of the initial value problem for the scalar wave equation are obtained in space-times with hypersurface singularities

General Relativity and Quantum Cosmology · Physics 2009-09-25 J. A. Vickers , J. P. Wilson

We generalize the construction of Snyder to a Lorentz covariant noncommutative superspace.

High Energy Physics - Theory · Physics 2010-04-05 Machiko Hatsuda , Warren Siegel

This paper discusses the dimensions of the spline spaces over T-meshes with lower degree. Two new concepts are proposed: extension of T-meshes and spline spaces with homogeneous boundary conditions. In the dimension analysis, the key…

Numerical Analysis · Mathematics 2008-04-17 Jiansong Deng , Falai Chen , Liangbing Jin

A generalization of metric space is presented which is shown to admit a theory strongly related to that of ordinary metric spaces. To avoid the topological effects related to dropping any of the axioms of metric space, first a new, and…

Metric Geometry · Mathematics 2012-01-20 Ittay Weiss

We generalize a theorem of Delzant classifying compact connected symplectic manifolds with completely integrable torus actions to certain singular symplectic spaces. The assumption on singularities is that if they are not finite quotient…

Symplectic Geometry · Mathematics 2007-05-23 D. Burns , V. Guillemin , E. Lerman

T-convergence groups is a natural extension of lattice-valued topological groups, which is a newly introduced mathematical structure. In this paper, we will further explore the theory of T-convergence groups. The main results include: (1)…

Logic · Mathematics 2024-09-10 Lingqiang Li , Qiu Jin

In this article, we develop an algorithm to calculate the set of all integers $m$ for which there exists a linear operator $T$ on ${\mathbb R}^n$ such that ${\mathbb R}^n$ has exactly $m$ $T$-invariant subspaces. A brief discussion is…

Rings and Algebras · Mathematics 2012-01-17 Josh Ide , Lenny Jones

Given an alternating trilinear form T on the V=F^n let L_T denote the set of T-singular lines in the projective space PV. These are all lines <a,b> for which the linear form T(a,b,.) is identically zero. Amongst the immense profusion of…

Algebraic Geometry · Mathematics 2017-10-10 Jan Draisma , Ron Shaw

The graph of a real symplectic linear transformation is an R-Lagrangian subspace of a complex symplectic vector space. The restriction of the complex symplectic form is thus purely imaginary and may be expressed in terms of the generating…

Symplectic Geometry · Mathematics 2015-07-15 J. Chris Hellmann , Brennan Langenbach , Michael VanValkenburgh

In this paper we proof the existence of a linearization for singular principal G-bundles not depending on the base curve. This allow us to construct the relative compact moduli space of {\delta}-(semi)stable singular principal G-bundles…

Algebraic Geometry · Mathematics 2018-06-27 Ángel Luis Muñoz Castañeda

We define the notion of extrinsic symplectic symmetric spaces and exhibit some of their properties. We construct large families of examples and show how they fit in the perspective of a complete classification of these manifolds. We also…

Symplectic Geometry · Mathematics 2009-11-13 Michel Cahen , Simone Gutt , Nicolas Richard , Lorenz Schwachhoefer

We present the basic concepts of tensor products of vector spaces, emphasizing linear algebraic and combinatorial techniques as needed for applied areas of research. The topics include (1) Introduction; (2) Basic multilinear algebra; (3)…

Commutative Algebra · Mathematics 2015-10-09 S. Gill Williamson

Methods of *-representations in Hilbert space are applied to study of systems of $n$ subspaces in a linear space. It is proved that the problem of description of $n$-transitive subspaces in a finite-dimensional linear space is *-wild for $n…

Representation Theory · Mathematics 2008-04-24 Yuliya P. Moskaleva , Yurii S. Samoilenko

We introduce strings in metric spaces and define string complexes of metric spaces. We describe the class of 2-dimensional topological spaces which arise in this way from finite metric spaces.

Metric Geometry · Mathematics 2024-04-17 Vladimir Turaev

In this paper, we introduce a generalization of the pointwise H\"older spaces. We give alternative definitions of these spaces, look at their relationship with the wavelets and introduce a notion of generalized H\"older exponent.

Functional Analysis · Mathematics 2013-07-12 Damien Kreit , Samuel Nicolay

In this paper, first we give a notion for linear Weingarten spacelike hypersurfaces with $P+aH=b$ in a locally symmetric Lorentz space $L_{1}^{n+1}$. Furthermore, we study complete or compact linear Weingarten spacelike hypersurfaces in…

Differential Geometry · Mathematics 2013-09-10 Zhongyang Sun

We describe the T-space of central polynomials for both the unitary and the nonunitary infinite dimensional Grassmann algebra over a field of characteristic p not equal to 2 (infinite field in the case of the unitary algebra).

Rings and Algebras · Mathematics 2011-04-26 C. Bekh-Ochir , S. A. Rankin