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We study a pair of dual operads which arise in the study of moduli spaces of pointed genus 0 curves (this duality is similar to that between commutative and Lie algebras). These operads are both quadratic, and even Koszul, and arise in the…

alg-geom · Mathematics 2008-02-03 Ezra Getzler

For a Koszul operad $\mathcal{P}$, there are several existing approaches to the notion of a homotopy between homotopy morphisms of homotopy $\mathcal{P}$-algebras. Some of those approaches are known to give rise to the same notions. We…

Category Theory · Mathematics 2015-07-15 Vladimir Dotsenko , Norbert Poncin

The purpose of this paper is to investigate the relationship between hairy graph complexes associated to cyclic operads and their counterparts for operads (and, more generally, dioperads). This is based on the author's interpretation of…

Algebraic Topology · Mathematics 2026-04-16 Geoffrey Powell

Let C be a coalgebra over a field k and A its dual algebra. The category of C-comodules is equivalent to a category of A-modules. We use this to interpret the cotensor product M \square N of two comodules in terms of the appropriate…

Rings and Algebras · Mathematics 2007-05-23 Lowell Abrams , Charles Weibel

Let $A$ and $B$ be two algebraic quantum groups (i.e. multiplier Hopf algebras with integrals). Assume that $B$ is a right $A$-module algebra and that $A$ is a left $B$-comodule coalgebra. If the action and coaction are matched, it is…

Rings and Algebras · Mathematics 2012-02-06 Lydia Delvaux , Alfons Van Daele , Shuanhong Wang

We extend the Koszul duality theory of associative algebras to algebras over an operad. Recall that in the classical case, this Koszul duality theory relies on an important chain complex: the Koszul complex. We show that the cotangent…

Algebraic Topology · Mathematics 2010-04-02 Joan Milles

We endow the category of bialgebras over a pair of operads in distribution with a cofibrantly generated model category structure. We work in the category of chain complexes over a field of characteristic zero. We split our construction in…

Algebraic Topology · Mathematics 2013-09-27 Sinan Yalin

We prove a conjecture of Morel identifying Voevodsky's homotopy invariant sheaves with transfers with spectra in the stable homotopy category which are concentrated in degree zero for the homotopy t-structure and have a trivial action of…

Algebraic Geometry · Mathematics 2010-05-25 Frédéric Déglise

A polyhedral product is a natural subspace of a Cartesian product that is specified by a simplicial complex. The modern formalism arose as a generalization of the spaces known as moment-angle complexes which were developed within the…

Algebraic Topology · Mathematics 2024-08-27 A. Bahri , M. Bendersky , F. R. Cohen

For operads with a map from the curved homotopy Lie operad, we introduce a corresponding curved variant `cTw' of Willwacher's operadic twisting comonad `Tw'. We show that cTw-coalgebra structures on such an operad are in bijection with…

Algebraic Topology · Mathematics 2025-12-15 Guillaume Laplante-Anfossi , Adrian Petr , Vivek Shende

We construct a localization for operads with respect to one-ary operations based on the Dwyer-Kan hammock localization. For an operad O and a sub-monoid of one-ary operations W we associate an operad LO and a canonical map O to LO which…

Category Theory · Mathematics 2017-09-18 Maria Basterra , Irina Bobkova , Kate Ponto , Ulrike Tillmann , Sarah Yeakel

Given a hypersurface singularity (not necessarily isolated) with a finite abelian group action, we develop a method to define an explicit product structure on the twisted Koszul algebra (whose invariant subalgebra is the orbifold Koszul…

Algebraic Geometry · Mathematics 2024-03-11 Sangwook Lee

We define a notion of Koszul dual of a monoid object in a monoidal biclosed model category. Our construction generalizes the classic Yoneda algebra $Ext_A(k,k)$. We apply this general construction to define the Koszul dual of a category…

Category Theory · Mathematics 2022-04-08 Hadrien Espic

In this paper we investigate how to simultaneously change homotopy algebras of a certain type and a corresponding infinity morphism between them, and show that this can be done in a homotopically unique way. More precisely, for a reduced…

K-Theory and Homology · Mathematics 2015-06-02 Brian Paljug

We study the construction of tensor products of representations up to homotopy, which are the A-infinity version of ordinary representations. We provide formulas for the construction of tensor products of representations up to homotopy and…

Algebraic Topology · Mathematics 2010-09-30 Camilo Arias Abad , Marius Crainic , Benoit Dherin

We describe a model structure for coloured operads with values in the category of symmetric spectra (with the positive model structure), in which fibrations and weak equivalences are defined at the level of the underlying collections. This…

Algebraic Topology · Mathematics 2012-02-28 Javier J. Gutiérrez , Rainer M. Vogt

The purpose of this paper is to show that various convolution products are fully homotopical, meaning that they preserve weak equivalences in both variables without any cofibrancy hypothesis. We establish this property for diagrams of…

Algebraic Topology · Mathematics 2021-04-27 Steffen Sagave , Stefan Schwede

This paper is concerned with the theory of cup-products in Hopf-type cyclic cohomology of algebras and coalgebras. Here we give detailed proofs of the statements, announced in our previous paper. We show that the cyclic cohomology of a…

K-Theory and Homology · Mathematics 2007-05-23 I. Nikonov , G. Sharygin

We study the Andr\'e-Quillen cohomology with coefficients of an algebra over an operad. Using resolutions of algebras coming from Koszul duality theory, we make this cohomology theory explicit and we give a Lie theoretic interpretation. For…

Algebraic Topology · Mathematics 2022-10-24 Joan Millès

This paper studies the existence of model category structures on algebras and modules over operads in monoidal model categories.

Algebraic Topology · Mathematics 2009-06-03 John E. Harper