$\mathcal{S}$-categories, $\mathcal{S}$-groupoids, Segal categories and quasicategories

Details $\mathcal{S}$-categories, $\mathcal{S}$-groupoids, Segal categories and quasicategories $\mathcal{S}$-categories, $\mathcal{S}$-groupoids, Segal categories and quasicategories

2004-01-21

arxiv.org/abs/math/0401274v1

Mathematics

Algebraic Topology

Latex file, 36 pages with 5 figures

Scientific paper

The notes were prepared for a series of talks that I gave in Hagen in late June and early July 2003, and, with some changes, in the University of La Lagu\~{n}a, the Canary Islands, in September, 2003. They aim (i) to revisit some oldish material on abstract homotopy and simplicial ly enriched categories, that seems to be being used in today's resurgence of interest in the area and to try to view it in a new light, or perhaps from new directions; (ii) to introduce Segal categories and various other tools used by the Nice-Toulouse group of abstract homotopy theorists and link them into some of the older ideas; (iii) to introduce Joyal's quasicategories, and show how that theory links in with some old ideas of Boardman and Vogt, Dwyer and Kan, and Cordier and Porter; and finally to ask lots of questions of myself and of the reader.

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