Global restrictions on ramification in number fields |
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Authors: | H. Zantema |
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Affiliation: | (1) Department of Mathematics, Universiteit van Amsterdam, Roetersstraat 15, 1018 WB Amsterdam, The Netherlands |
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Abstract: | Let G be the Galois group of a number field extension. For each primep a map (p)H2(G,{±1}){±1} is defined. This local symbol has a global restriction: the product of (p) over all primes is trivial. This paper discusses how to compute (p) and gives an application to integer valued polynomials over certain quartic number fields. |
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