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On the non-existence of cyclic splitting fields for division algebras

  • Mehran Motiee EMAIL logo
Published/Copyright: July 9, 2017

Abstract

Let D be a division algebra over its center F of degree n. Consider the group μZ(D)=μn(F)/Z(D), where μn(F) is the group of all the n-th roots of unity in F*, and Z(D) is the center of the commutator subgroup of the group of units D* of D. It is shown that if μZ(DFL)1 for some L containing all the primitive nk-th roots of unity for all positive integers k, then D is not split by any cyclic extension of F. This criterion is employed to prove that some special classes of division algebras are not cyclically split.

MSC 2010: 11R52; 16W60

Communicated by Freydoon Shahidi


Acknowledgements

The author thanks the referee for constructive comments. He is also grateful to the Research Council of Babol Noshirvani University of Technology for support. He wishes to thank Roozbeh Hazrat and Jean-Pierre Tignol for helpful suggestions on the expositions of this paper. He is also greatly indebted to Adrian Wadsworth for several helpful comments during the preparation of the paper.

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Received: 2016-5-23
Revised: 2017-6-7
Published Online: 2017-7-9
Published in Print: 2018-3-1

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