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We introduce M-theoretic generalisations of the notion of (exact) Courant algebroid, and summarise their connections to generalised geometry, U-duality, and the physics of strings, membranes, and fivebranes. This is a summary of a paper…

Mathematical Physics · Physics 2019-04-30 Alex S. Arvanitakis

We give a rather general construction of double categories and so, under further conditions, double groupoids, from a structure we call a `double module'. We also give a homotopical construction of a double groupoid from a triad consisting…

Category Theory · Mathematics 2009-03-21 Ronald Brown

We introduce the theory of strong homotopy types of simplicial complexes. Similarly to classical simple homotopy theory, the strong homotopy types can be described by elementary moves. An elementary move in this setting is called a strong…

Geometric Topology · Mathematics 2009-07-20 Jonathan Ariel Barmak , Elias Gabriel Minian

Monads are well known to be equivalent to lax functors out of the terminal category. Morita contexts are here shown to be lax functors out of the chaotic category with two objects. This allows various aspects in the theory of Morita…

Category Theory · Mathematics 2014-05-21 Stephen Lack

Bilinear maps and their classifying tensor products are well-known in the theory of linear algebra, and their generalization to algebras of commutative monads is a classical result of monad theory. Motivated by constructions needed in…

Category Theory · Mathematics 2022-05-12 Tomáš Jakl , Dan Marsden , Nihil Shah

In this paper we define the fundamental quandle of knotoids and linkoids and prove that it is invariant under the under forbidden-move and hence encodes only the information of the underclosure of the knotoid. We then introduce $n$-pointed…

Geometric Topology · Mathematics 2024-04-29 Neslihan Gügümcü , Runa Pflume

A general method to easily build global and relative operators for any number n of elementary systems if they are defined for 2 is presented. It is based on properties of the morphisms valued in the tensor products of algebras of the…

High Energy Physics - Theory · Physics 2015-06-26 Emanuele Sorace

This paper is a rather informal guide to some of the basic theory of 2-categories and bicategories, including notions of limit and colimit, 2-dimensional universal algebra, formal category theory, and nerves of bicategories. As is the way…

Category Theory · Mathematics 2010-09-10 Stephen Lack

We discuss generalised duality theory for monoidal categories and its applications to the categories of exact endofunctors, graded vector spaces, and topological vector spaces.

Category Theory · Mathematics 2023-01-25 Stefan Zetzsche

We introduce two new classes of single-valued contractions of polynomial type defined on a metric space. For the first one, called the class of polynomial contractions, we establish two fixed point theorems. Namely, we first consider the…

General Topology · Mathematics 2025-05-27 Mohamed Jleli , Cristina Maria Pacurar , Bessem Samet

We propose that generalized symmetries in some string-constructed QFTs are given by K-theory. We thus have \textit{even-form} and \textit{odd-form} symmetries determined by $K_N(\partial X)$, the twisted K-theory as D-brane charges on the…

High Energy Physics - Theory · Physics 2026-03-20 Hao Y. Zhang

We apply the bar construction to the nerve of a double Lie groupoid to obtain a local Lie 2-groupoid. As an application, we recover Haefliger's fundamental groupoid from the fundamental double groupoid of a Lie groupoid. In the case of a…

Differential Geometry · Mathematics 2015-02-19 Rajan Amit Mehta , Xiang Tang

In this paper, we give precise mathematical form to the idea of a structure whose data and axioms are faithfully represented by a graphical calculus; some prominent examples are operads, polycategories, properads, and PROPs. Building on the…

Logic in Computer Science · Computer Science 2017-10-11 Richard Garner , Tom Hirschowitz

The concept of generalised (in the sense of Colombeau) connection on a principal fibre bundle is introduced. This definition is then used to extend results concerning the geometry of principal fibre bundles to those that only have a…

Functional Analysis · Mathematics 2016-09-07 Michael Kunzinger , Roland Steinbauer , James A. Vickers

We define a modular function which is a generalization of the elliptic modular lambda function. We show this function and the modular invariant function generate the modular function field with respect to the principal congruence subgroup.…

Number Theory · Mathematics 2015-04-21 Noburo Ishii

This paper explores the relationship amongst the various simplicial and pseudo-simplicial objects characteristically associated to any bicategory C. It proves the fact that the geometric realizations of all of these possible candidate…

Algebraic Topology · Mathematics 2014-10-01 P. Carrasco , A. M. Cegarra , A. R. Garzón

We introduce a monoidal category of corings using two different notions of corings morphisms. The first one is the (right) coring extensions recently introduced by T. Brzezi\'nski in [2], and the anther is the usual notion of morphisms…

Rings and Algebras · Mathematics 2007-05-23 L. El Kaoutit

This is our sequel to our previous work on the corresponding generalized Frobenius modules over some big multivariate Robba rings. We will go beyond our previous discussion where we focused on the corresponding analytic functions on…

Number Theory · Mathematics 2021-01-12 Xin Tong

This note investigates the relation between squeezing function and its generalizations. Using the relation obtained, we present an alternate method to find expression of generalized squeezing function of unit ball corresponding to the…

Complex Variables · Mathematics 2022-11-30 Naveen Gupta , Sanjay Kumar Pant

We provide a universal characterization of the construction taking a scheme $X$ to its stable $\infty$-category $\text{Mot}(X)$ of noncommutative motives, patterned after the universal characterization of algebraic K-theory due to…

K-Theory and Homology · Mathematics 2024-08-21 Aaron Mazel-Gee , Reuben Stern