The subject of this book is the theory of operads and colored operads, sometimes called symmetric multicategories. A (colored) operad is an abstract object which encodes operations with multiple inputs and one output and relations between such operations. The theory originated in the early 1970s in homotopy theory and quickly became very important in algebraic topology, algebra, algebraic geometry, and even theoretical physics (string theory). Topics covered include basic graph theory, basic category theory, colored operads, and algebras over colored operads. Free colored operads are discussed in complete detail and in full generality. The intended audience of this book includes students and researchers in mathematics and other sciences where operads and colored operads are used. The prerequisite for this book is minimal. Every major concept is thoroughly motivated. There are many graphical illustrations and about 150 exercises. This book can be used in a graduate course and for independent study.
Generalized Dyson Series, Generalized Feynman's Diagrams, the Feynman Integral, and Feynman's Operational Calculus
The Künneth Theorem and the Universal Coefficient Theorem for Equivariant K-theory and KK-theory
The prototypical example of an operad is called the endomorphism operad of an object A with EA(n) = Hom(A⊗n ,A). Here the elements are normally called n-ary operations, and the structure map γ comes from using the outputs ...
Tensor Products of Principal Series Representations: Reduction of Tensor Products of Principal Series: Representations of Complex Semisimple Lie Groups
... of Volterra operators with application to Brownian motion, 2002 Roger Chalkley, Basic global relative invariants for ... 2001 Palle E. T. Jorgensen, Ruelle operators: Functions which are harmonic with respect to a transfer operator, ...
This is the second part of a series of papers called "HAG", devoted to developing the foundations of homotopical algebraic geometry.
The maps from loop suspensions to loop spaces are investigated using group representations in this article.
This book, prefaced by Yuri I. Manin, gives a rigorous overview of some of the main advances in the theory of noncommutative motives. It is divided into three main parts.
Rings, Modules and Algebras