Crossed modules and strict Gr-categories
Commun. Korean Math. Soc. 2014 Vol. 29, No. 1, 9-22
Printed January 31, 2014
Nguyen Tien Quang, Pham Thi Cuc, and Nguyen Thu Thuy
Hanoi National University of Education, Hongduc University, Academy of Finance, Science Faculty
Abstract : In this paper we state some applications of Gr-category theory to the classification problem of crossed modules and to that of group extensions of the type of a crossed module.
Keywords : crossed module, Gr-category, group extension, group cohomology, obstruction
MSC numbers : 20J05, 20E22, 18D10
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