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4th Conference Geometry and Topology of Manifolds
April 28 - May 4, 2002
Technical University of Lodz; University Mining and Metallurgy, Cracow; Jagiellonian University, Cracow
Krynica, Poland

Organizers
Jan Kubarski (chairman), Lodz, Poland; Tomasz Rybicki, Cracow, Poland; Robert Wolak, Cracow, Poland

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Multiple groupoids: a non abelian tool for local-to-global problems
by
Ronald Brown
Mathematics Division, School of Informatics, University of Wales, Bangor

A 1-fold groupoid is just a groupoid and and n-fold groupoid is a set with n groupoid structures any two of which satisfy an interchange law. The aim of the talk is to show the intuitions behind how types of n-fold groupoid have been used in homotopy theory and the cohomology of groups to give new calculations, with the aim of encouraging their use in differential situations.

reference: articles linked from http://www.bangor.ac.uk/ mas010

Date received: March 29, 2002

Copyright © 2002 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cajc-05.