Pullbacks of Crossed Modules and cat^1-Groups

Authors: MURAT ALP

Abstract: In this paper, wer define the pullback cat$^{1}$-groups and we showed that the category of bullback cat$^{1}$-group is equivalent to the category of pullback crossed modules. 1991 A. M. S. C.: 13D99, 16A99, 17B99, 18D35.

Keywords: Crossed modules, cat^1-groups, pullback.

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