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On the Imbedding Problem of Normal Algebraic Number Fields

Published online by Cambridge University Press:  22 January 2016

Eizi Inaba*
Affiliation:
Mathematical Institute, Ochanomizu University
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Let G and H be finite groups. If a group G̅ has an invariant subgroup H̅, which is isomorphic with H, such that the factor group G̅/H̅ is isomorphic with G. then we say that G̅ is an extension of H by G. Now let G be the Galois group of a normal extension K over an algebraic number field k of finite degree. The imbedding problem concerns us with the question, under what conditions K can be imbedded in a normal extension L over k such that the Galois group of L over k is isomorphic with G̅ and K corresponds to H̅. Brauer connected this problem with the structure of algebras over k, whose splitting fields are isomorphic with K.

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Research Article
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Copyright © Editorial Board of Nagoya Mathematical Journal 1952