The aim of the series is to present new and important developments in pure and applied mathematics. Well established in the community over two decades, it offer

This series is devoted to the publication of monographs, lecture resp. seminar notes, and other materials arising from programs of the OSU Mathemaical Research

Category theory has become the universal language of modern mathematics. This book is a collection of articles applying methods of category theory to the areas

Basic work on two-dimensional homotopy theory dates back to K. Reidemeister and J. H. C. Whitehead. Much work in this area has been done since then, and this bo

Since the work of Stasheff and Sugawara in the 1960s on recognition of loop space structures on $H$-spaces, the notion of higher homotopies has grown to be a fu