ISBN-13: 9780821821701 / Angielski / Twarda / 2001 / 235 str.
More and more often, algebraic structures more complicated than just a topological monoid, an algebra, or a coalgebra, have been used for solving problems of algebraic topology and, in particular, difficult problems of homotopy theory, A convenient language for describing various structures arising naturally on topological spaces and on their cohomology and homotopy groups is the language of operads and algebras over an operad. This language was proposed by JP May in the 1970s to describe the structures on various loop spaces.