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A multiplier system of weight $k\in\mathbb{Z}$ for a group $G$ is a group homomorphism from $G$ to the group $S^1$ of complex numbers of modulus $1$, with the added condition that, if $-I\in G$, then $v(-I)=(-1)^k$.

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• Review status: reviewed
• Last edited by Andreea Mocanu on 2016-03-25 16:16:00
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