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The Cambrian lattices, introduced in (Reading, 2006), generalize the Tamari lattice to any choice of Coxeter element in any finite Coxeter group. They are further generalized to the m-Cambrian lattices (Stump, Thomas, Williams, 2015).…

Combinatorics · Mathematics 2025-04-21 Clément Chenevière , Wenjie Fang , Corentin Henriet

We characterize when the finite Cartesian product of central sets near idempotent is central near idempotent. Moreover, we provide a partial characterization for the infinite Cartesian product of the same. Then, we study the abundance of…

Combinatorics · Mathematics 2024-04-11 Surajit Biswas , Sourav Kanti Patra , Sabyasachi Dey

We present further results on a class of sums which involve complex powers of the distance to points in a two-dimensional square lattice and trigonometric functions of their angle, supplementing those in a previous paper (McPhedran et al,…

Mathematical Physics · Physics 2009-11-04 Ross C. McPhedran Lindsay C. Botten , Nicolae-Alexandru P. Nicorovici

In this paper we develop a theory of curvature (resp. multiplicity) invariant for tensor products of full Fock spaces and also for tensor products of symmetric Fock spaces. This is an attempt to find a more general framework for these…

Functional Analysis · Mathematics 2015-03-16 Gelu Popescu

The purpose of this article is to study the existence of Deligne's tensor product of abelian categories by comparing it with the well-known ten- sor product of finitely cocomplete categories. The main result states that the former exists…

Category Theory · Mathematics 2012-12-10 Ignacio Lopez Franco

I discuss possible definitions of categories of vector spaces enriched with a notion of formal infinite linear combination in the likes of the formal infinite linear combinations one has in the context of generalized power series, I call…

Category Theory · Mathematics 2026-03-10 Pietro Freni

We give an answer to the following question: for which metric in an abstract lattice the completion as a metric space coincides with the completion as a lattice. We obtain the answer for inductive limits of lattices which are complete in…

Functional Analysis · Mathematics 2007-05-23 Serguei Samborski

We study combinatorial properties of convex sets over arbitrary valued fields. We demonstrate analogs of some classical results for convex sets over the reals (e.g. the fractional Helly theorem and B\'ar\'any's theorem on points in many…

Combinatorics · Mathematics 2023-05-31 Artem Chernikov , Alex Mennen

Let $V$ be a complete discrete valuation ring with fraction field $F$ of characteristic zero and with residue field $\mathbb{F}$. We introduce analytic cyclic homology of complete torsion-free bornological algebras over $V$. We prove that…

K-Theory and Homology · Mathematics 2020-11-04 Guillermo Cortiñas , Ralf Meyer , Devarshi Mukherjee

An example of a cocomplete abelian category that is not complete is constructed.

Category Theory · Mathematics 2018-05-29 Jeremy Rickard

We introduce the notion of a complex cell, a complexification of the cells/cylinders used in real tame geometry. For $\delta\in(0,1)$ and a complex cell $\mathcal{C}$ we define its holomorphic extension…

Complex Variables · Mathematics 2019-04-19 Gal Binyamini , Dmitry Novikov

We study how tensor products of representations decompose when restricted from a compact Lie algebra to one of its subalgebras. In particular, we are interested in tensor squares which are tensor products of a representation with itself. We…

Mathematical Physics · Physics 2015-08-25 Robert Zeier , Zoltán Zimborás

We establish comparison and divisibility properties for crossed product C*-algebras arising from automorphisms of algebras C (X, D) which lie over minimal homeomorphisms, from actions of compact groups which have finite Rokhlin dimension…

Operator Algebras · Mathematics 2026-04-14 Dawn Archey , Julian Buck , Javad Mohammadkarimi , N. Christopher Phillips , Apurva Seth

A systematic theory of product and diagonal states is developed for tensor products of $\mathbb Z_2$-graded $*$-algebras, as well as $\mathbb Z_2$-graded $C^*$-algebras. As a preliminary step to achieve this goal, we provide the…

Operator Algebras · Mathematics 2020-12-18 Vitonofrio Crismale , Rocco Duvenhage , Francesco Fidaleo

Several well known polytopal constuctions are examined from the functorial point of view. A naive analogy between the Billera-Sturmfels fiber polytope and the abelian kernel is disproved by an infinite explicit series of polytopes. A…

Combinatorics · Mathematics 2018-05-21 Joseph Gubeladze

Let R\_{0,n} be the Clifford algebra of the antieuclidean vector space of dimension n. The aim is to built a function theory analogous to the one in the C case. In the latter case, the product of two holomorphic functions is holomorphic,…

Complex Variables · Mathematics 2007-05-23 Guy Laville

We study the geometry of the algebraic set of tuples of composable matrices which multiply to a fixed matrix, using tools from the theory of quiver representations. In particular, we determine its codimension $C$ and the number $\theta$ of…

Algebraic Geometry · Mathematics 2024-12-12 Simon Pepin Lehalleur , Richárd Rimányi

Near-vector spaces extend linear algebra tools to non-linear algebraic structures, enabling the study of non-linear problems. However, explicit constructions remain rare. This paper introduces a broad computable family of near-vector…

Rings and Algebras · Mathematics 2025-04-07 L. Boonzaaier , S. Marques , D. Moore

It has been known that the Cartesian product of two Suslin non-sigma-porous sets in topologically complete metric spaces is non-sigma-porous in the product space. The main aim of the present paper is to answer the natural question whether a…

Functional Analysis · Mathematics 2013-09-12 Martin Rmoutil

Let L_1 and L_2 be complete atomistic lattices. In a previous paper, we have defined a set S=S(L_1,L_2) of complete atomistic lattices, the elements of which are called weak tensor products of L_1 and L_2. S is defined by means of three…

Logic · Mathematics 2011-12-25 Boris Ischi
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