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Several topological and homological operads based on families of projectively weighted arcs in bounded surfaces are introduced and studied. The spaces underlying the basic operad are identified with open subsets of a compactification due to…

Geometric Topology · Mathematics 2014-11-11 Ralph M Kaufmann , Muriel Livernet , RC Penner

Curved algebras are a generalization of differential graded algebras which have found numerous applications recently. The goal of this foundational article is to introduce the notion of a curved operad, and to develop the operadic calculus…

Algebraic Topology · Mathematics 2023-12-12 Victor Roca i Lucio

A general notion of operad is given, which includes as instances, the operads originally conceived to study loop spaces, as well as the higher operads that arise in the globular approach to higher dimensional algebra. In the framework of…

Category Theory · Mathematics 2007-05-23 Mark Weber

Given a symplectic manifold $M$, we may define an operad structure on the the spaces $\op^k$ of the Lagrangian submanifolds of $(\bar{M})^k\times M$ via symplectic reduction. If $M$ is also a symplectic groupoid, then its multiplication…

Symplectic Geometry · Mathematics 2020-05-29 Alberto S. Cattaneo , Benoit Dherin , Giovanni Felder

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 [KW14], the new concept of Feynman categories was introduced to simplify the discussion of operad--like objects. In this present paper, we demonstrate the usefulness of this approach, by introducing the concept of decorated Feynman…

Algebraic Topology · Mathematics 2017-11-15 Ralph M. Kaufmann , Jason Lucas

It is well known that not every combinatorial configuration admits a geometric realization with points and lines. Moreover, some of them do not even admit realizations with pseudoline arrangements, i.e., they are not topological. In this…

Combinatorics · Mathematics 2014-10-10 Jürgen Bokowski , Jurij Kovič , Tomaž Pisanski , Arjana Žitnik

This is a copy of my bachelor thesis, written under supervision of Sergey Shadrin in 2010. Original abstract: In this thesis we prove that the wheeled Poisson operad is not a wheeled Koszul operad. Chapter 1 introduces operads, the subclass…

K-Theory and Homology · Mathematics 2023-12-01 Simen Bruinsma

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

We introduce a functor ${\sf As}$ from the category of posets to the category of nonsymmetric binary and quadratic operads, establishing a new connection between these two categories. Each operad obtained by the construction ${\sf As}$…

Combinatorics · Mathematics 2016-04-06 Samuele Giraudo

This paper examines operad structures derived from poset matrices by formulating a set of new construction rules for poset matrices. In this direction, eleven different partial composition operations will be introduced as the basis for the…

Combinatorics · Mathematics 2024-01-17 Arnauld Mesinga Mwafise , Gi-Sang Cheon , Hong Joon Choi , Samuele Giraudo

Pairs of graded graphs, together with the Fomin property of graded graph duality, are rich combinatorial structures providing among other a framework for enumeration. The prototypical example is the one of the Young graded graph of integer…

Combinatorics · Mathematics 2021-04-27 Samuele Giraudo

We define a construction on operads which yields a new description of the minimal model. The construction also allows us to define algebraic structures on the homology of chain complexes with homologously trivial operad algebra structures,…

Algebraic Topology · Mathematics 2015-08-17 Cole Hugelmeyer

We introduce here the notion of Koszul duality for monoids in the monoidal category of species with respect to the ordinary product. To each Koszul monoid we associate a class of Koszul algebras in the sense of Priddy, by taking the…

Combinatorics · Mathematics 2008-12-31 Miguel A. Mendez

Operads were originally defined as V-operads, that is, enriched in a symmetric or braided monoidal category V. The symmetry or braiding in V is required in order to describe the associativity axiom the operads must obey, as well as the…

Category Theory · Mathematics 2007-05-23 S. Forcey , J. Siehler , E. Seth Sowers

This paper is an introduction to a series of papers in which we give combinatorial models for certain important operads (including A-infinity and E-infinity operads, the little n-cubes operads, and the framed little disks operad) and…

Quantum Algebra · Mathematics 2007-05-23 James E. McClure , Jeffrey H. Smith

We provide a very general approach to placing model structures and semi-model structures on algebras over symmetric colored operads. Our results require minimal hypotheses on the underlying model category $\mathcal{M}$, and these hypotheses…

Algebraic Topology · Mathematics 2021-09-14 David White , Donald Yau

Shuffle operads were introduced to forget the symmetric group actions on symmetric operads while preserving all possible operadic compositions. Rewriting methods were then applied to symmetric operads via shuffle operads: in particular, a…

Category Theory · Mathematics 2022-08-05 Philippe Malbos , Isaac Ren

We study the operad structure on the homology of moduli spaces of pointed rooted trees of $d$-dimensional projective spaces, introduced by Chen, Gibney and Krashen a couple of decades ago. We describe this operad by generators and…

Algebraic Topology · Mathematics 2025-09-25 Vladimir Dotsenko , Eduardo Hoefel , Sergey Shadrin , Grigory Solomadin

The theory of operads (May, cyclic, modular, PROPs, etc) is extended to include higher dimensional phenomena, i.e. operations between operations, mimicking the algebraic structure on varieties of arbitrary dimensions, having marked…

Quantum Algebra · Mathematics 2010-12-16 Dennis Borisov