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In order to solve two problems in deformation theory, we establish natural structures of homotopy Lie algebras and of homotopy associative algebras on tensor products of algebras of different types and on mapping spaces between coalgebras…

Quantum Algebra · Mathematics 2018-06-29 Daniel Robert-Nicoud

This paper is the first in a series of works devoted to an operadic study of Nijenhuis structures, focusing on Nijenhuis associative algebras. We introduce the concept of homotopy Nijenhuis associative algebras and demonstrate that the…

K-Theory and Homology · Mathematics 2024-12-24 Chao Song , Kai Wang , Yuanyuan Zhang , Guodong Zhou

We generalize the classical operad pair theory to a new model for $E_\infty$ ring spaces, which we call ring operad theory, and establish a connection with the classical operad pair theory, allowing the classical multiplicative infinite…

Algebraic Topology · Mathematics 2024-09-17 Kailin Pan

The notion of a coherent unit action on algebraic operads was first introduced by Loday for binary quadratic nonsymmetric operads and generalized by Holtkamp, to ensure that the free objects of the operads carry a Hopf algebra structure.…

Quantum Algebra · Mathematics 2021-08-13 Li Guo , Yunnan Li

This paper is a continuation of ``Operads, Grothendieck topologies and deformation theory'' (alg-geom/9502010). We show how to develop a cohomology theory that would control deformations of a sheaf of associative algebras over a scheme by…

alg-geom · Mathematics 2008-02-03 Dennis Gaitsgory

This thesis is concerned with the application of operadic methods, particularly modular operads, to questions arising in the study of moduli spaces of surfaces as well as applications to the study of homotopy algebras and new constructions…

Geometric Topology · Mathematics 2012-09-06 Christopher Braun

We show that when using the underlying positive model structure on symmetric spectra one obtains cofibrancy conditions for operadic constructions under much milder hypothesis than one would need for general categories. Our main result…

Algebraic Topology · Mathematics 2017-10-25 Luís Alexandre Pereira

The purpose of this foundational paper is to introduce various notions and constructions in order to develop the homotopy theory for differential graded operads over any ring. The main new idea is to consider the action of the symmetric…

Algebraic Topology · Mathematics 2021-08-25 Malte Dehling , Bruno Vallette

Based on a relative Wu theorem in \'etale cohomology, we study the compatibility of Steenrod operations on Chow groups and on \'etale cohomology. Using the resulting obstructions to algebraicity, we construct new examples of non-algebraic…

Algebraic Geometry · Mathematics 2025-03-12 Olivier Benoist

In this expository paper we give an elementary, hands-on computation of the homology of the little disks operad, showing that the homology of a $d-fold loop space is a Poisson algebra. One aim is to familiarize a greater audience with…

Algebraic Topology · Mathematics 2010-02-20 Dev Sinha

Weighted Rota-Baxter operators on associative algebras are closely related to modified Yang-Baxter equations, splitting of algebras, weighted infinitesimal bialgebras, and play an important role in mathematical physics. For any $\lambda \in…

Representation Theory · Mathematics 2022-09-21 Apurba Das

We present an unified construction for algebras and modules homologies and cohomologies, in the case of associative, commuttaive, Lie and Gerstenhaber algebras. We make a distinction between the linear part of the construction of algebras…

Quantum Algebra · Mathematics 2008-08-27 Ridha Chatbouri

The operad of moulds is realized in terms of an operational calculus of formal integrals (continuous formal power series). This leads to many simplifications and to the discovery of various suboperads. In particular, we prove a conjecture…

Quantum Algebra · Mathematics 2007-10-18 Frédéric Chapoton , Florent Hivert , Jean-Christophe Novelli , Jean-Yves Thibon

We here both unify and generalize nonassociative structures on typed binary trees, that is to say plane binary trees which edges are decorated by elements of a set $\Omega$. We prove that we obtain such a structure, called an…

Combinatorics · Mathematics 2020-02-28 Loic Foissy

Let M be a bicomplete, closed symmetric monoidal category. Let P be an operad in M, i.e., a monoid in the category of symmetric sequences of objects in M, with its composition monoidal structure. Let R be a P-co-ring, i.e., a comonoid in…

Algebraic Topology · Mathematics 2007-05-23 Kathryn Hess , Paul-Eugene Parent , Jonathan Scott

The deformation equation and its integrability condition (Bianchi identity) of a non-(co)associative deformation in operad algebra are found. Based on physical analogies, cogravity equations are proposed.

Quantum Algebra · Mathematics 2009-11-07 Eugen Paal

The goal of this memoir is to prove that the bar complex B(A) of an E-infinity algebra A is equipped with the structure of a Hopf E-infinity algebra, functorially in A. We observe in addition that such a structure is homotopically unique…

Algebraic Topology · Mathematics 2007-05-23 Benoit Fresse

We introduce the operad Moor, dual of the operad NAP and the notion of Moor-bialgebras. We warn the reader that the compatibility relation linking the Moor-operation with the Moor-cooperation is not distributive in the sense of Loday.…

Quantum Algebra · Mathematics 2008-06-25 Leroux Philippe

Operads were originally defined by May to have right actions of the symmetric groups, but later formulations have also used no groups actions at all or group actions by such families as the braid groups. We call such families action…

Category Theory · Mathematics 2026-03-23 Alexander Corner , Nick Gurski

The aim of this work is to introduce and study the notions of Hom-pre-Jordan algebra and Hom-J-dendriform algebra which generalize Hom-Jordan algebras. Hom-Pre-Jordan algebras are regarded as the underlying algebraic structures of the…

Rings and Algebras · Mathematics 2020-07-03 Taoufik Chtioui , Sami Mabrouk , Abdenacer Makhlouf