Invariants Associated to Orthogonal ǫ-constants
نویسنده
چکیده
In this paper we use the theory of ǫ-constants associated to tame finite group actions on arithmetic surfaces to define a cohomological invariant μ(X , G, V ). We then discuss the relationship between this invariant and w2(π), the Galois theoretic invariant associated to tame covers of surfaces.
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تاریخ انتشار 2002