Universal Journal of Mathematics and Mathematical Sciences
Volume 4, Issue 2, Pages 253 - 284
(October 2013)
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FACTOR SETS IN GRADED PICARD CATEGORIES
Nguyen Tien Quang, Pham Thi Cuc and Che Thi Kim Phung
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Abstract:
One can interpret the symmetric cohomology group  of G-modules by means of factor sets with coefficients in Picard categories. The precise theorem on the classification of graded Picard categories of type  is therefore stated. The group  is interpreted in terms of extensions of G-modules. |
| Keywords and phrases: crossed product, graded Picard category, G-module extension, factor set. |
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