tailieunhanh - The Factor Sets of Gr-Categories of the Type (Π, A)

Each Γ−monoidal extension of a Gr−category is determined by a factor set on a group Γ. In the paper "The Factor Sets of Gr-Categories of the Type (Π, A)", we shall show that the such factor set can be reduced and induces a 3-cocycle of Γ−groups. |

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