Categories and Groupoids (original) (raw)

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