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In this article, we give conditions guaranteeing the commutativity of a bounded self-adjoint operator with an unbounded closed symmetric operator.

Functional Analysis · Mathematics 2022-04-13 Souheyb Dehimi , Mohammed Hichem Mortad , Ahmed Bachir

We introduce the concept of linked systems of symmetric group divisible designs. The connection with association schemes is established, and as a consequence we obtain an upper bound on the number of symmetric group divisible designs which…

Combinatorics · Mathematics 2017-07-04 Hadi Kharaghani , Sho Suda

We study cobordisms of a class of topological operads called ``manifold operads''. These operads are generalizations of the Fulton-MacPherson operad: an operad built from configurations of points in Euclidean space. Cobordism of manifold…

Algebraic Topology · Mathematics 2026-05-14 Xujia Chen , Connor Malin , Paolo Salvatore

In this paper we provide an explicit general construction of higher homotopy operations in model categories, which include classical examples such as (long) Toda brackets and (iterated) Massey products, but also cover unpointed operations…

Algebraic Topology · Mathematics 2018-09-21 David Blanc , Mark W. Johnson , James M. Turner

In this paper, we introduce a notion of categorified cyclic operad for set-based cyclic operads with symmetries. Our categorification is obtained by relaxing defining axioms of cyclic operads to isomorphisms and by formulating coherence…

Category Theory · Mathematics 2019-11-22 Pierre-Louis Curien , Jovana Obradovic

Classical geometric and topological operations on polyhedra, maps and polytopes often give rise to structures with the same symmetry group as the original one, but with more flags. In this paper we introduce the notion of voltage operations…

Combinatorics · Mathematics 2022-02-14 Isabel Hubard , Elías Mochán , Antonio Montero

We consider higher symmetries and operator symmetries of linear partial differential equations. The higher symmetries form a Lie algebra, and operator ones form an associative algebra. The relationship between these symmetries is…

Exactly Solvable and Integrable Systems · Physics 2024-05-29 Oleg Kaptsov

We will introduce the notion of higher derived bracket construction in the category of operads and prove that the higher derived bracket construction of Lie operad is equivalent to the cobar construction of Leibniz operad. The theorem is…

Quantum Algebra · Mathematics 2013-01-01 K. Uchino

The purpose of this paper is to study the derived category of simplicial multicategories with arbitrary sets of objects (also known as, colored operads in simplicial sets). Our main result is a derived Morita theory for operads-where we…

Algebraic Topology · Mathematics 2011-11-17 Marcy Robertson

We consider several differential operators on compact almost-complex, almost-Hermitian and almost-K\"ahler manifolds. We discuss Hodge Theory for these operators and a possible cohomological interpretation. We compare the associated spaces…

Differential Geometry · Mathematics 2020-03-09 Nicoletta Tardini , Adriano Tomassini

Recent work by several authors has revealed the existence of many unexpected classes of normal weighted composition operators. On the other hand, it is known that every normal operator is a complex symmetric operator. We therefore undertake…

Functional Analysis · Mathematics 2012-05-22 Stephan Ramon Garcia , Christopher Hammond

In this paper, some left-symmetric algebras are constructed from linear functions. They include a kind of simple left-symmetric algebras and some examples appearing in mathematical physics. Their complete classification is also given, which…

Quantum Algebra · Mathematics 2007-11-24 Chengming Bai

We construct a generalization of the Day convolution tensor product of presheaves that works for certain double $\infty$-categories. Using this construction, we obtain an $\infty$-categorical version of the well-known description of…

Algebraic Topology · Mathematics 2021-03-16 Rune Haugseng

It is shown that operations of equivalence cannot serve for building algebras which would induce orthomodular lattices as the operations of implication can. Several properties of equivalence operations have been investigated. Distributivity…

Quantum Physics · Physics 2009-11-10 Norman D. Megill , Mladen Pavicic

The category of Hilbert spaces and contractions has filtered colimits, and tensoring preserves them. We also discuss (problems with) bounded maps.

Category Theory · Mathematics 2019-12-03 Branko Nikolić , Alessandra Di Pierro

This survey provides an elementary introduction to operads and to their applications in homotopical algebra. The aim is to explain how the notion of an operad was prompted by the necessity to have an algebraic object which encodes higher…

Algebraic Topology · Mathematics 2012-02-16 Bruno Vallette

We consider a class of discrete convex functionals which satisfy a (generalized) coarea formula, and study their limit in the continuum.

Numerical Analysis · Mathematics 2009-02-16 Antonin Chambolle , Alessandro Giacomini , Luca Lussardi

The paper shows that under some conditions the totalization of a cosimplicial space obtained from a multiplicative operad is a double loop space of the space of derived morphisms from the associative operad to the operad itself.

Algebraic Topology · Mathematics 2011-01-04 Victor Tourtchine

We introduce a functorial construction $\mathsf{C}$ which takes unitary magmas $\mathcal{M}$ as input and produces operads. The obtained operads involve configurations of chords labeled by elements of $\mathcal{M}$, called…

Combinatorics · Mathematics 2021-04-27 Samuele Giraudo

Proper splittings of operators are commonly used to study the convergence of iterative processes. In order to approximate solutions of operator equations, in this article we deal with proper splittings of closed range bounded linear…

Functional Analysis · Mathematics 2024-03-18 Guillermina Fongi , María Celeste Gonzalez