Categories and Groupoids

P. J. Higgins

Originally published by:
Van Nostrand Reinhold, 1971

Keywords: groupoids, subgroup theorems, covering morphisms, fundamental group, homology of groupoids

2000 MSC: 20L05, 18-01, 20E07, 20J05, 18B40, 18G30, 55Q05

Republished in:
Reprints in Theory and Applications of Categories, No. 7 (2005) pp 1-195

http://www.tac.mta.ca/tac/reprints/articles/7/tr7.pdf

Additional page set-ups - see Notes on Printing.

http://www.tac.mta.ca/tac/reprints/articles/7/tr7-2a4.pdf
http://www.tac.mta.ca/tac/reprints/articles/7/tr7-2l.pdf

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