p-Tower Groups over Quadratic Imaginary Number Fields

Details p-Tower Groups over Quadratic Imaginary Number Fields p-Tower Groups over Quadratic Imaginary Number Fields

2010-08-18

arxiv.org/abs/1008.3003v1

$p$-Tower Groups over Quadratic Imaginary Number Fields. Ann. Sci. Math. Qu\'ebec 32 (2008), no. 2, 199--209

Mathematics

Number Theory

10 pages

Scientific paper

The modern theory of class field towers has its origins in the study of the p-class field tower over a quadratic imaginary number field, so it is fitting that this problem be the first in the discipline to be nearing a solution. We survey the state of the subject and present a new cohomological condition for a quadratic imaginary number field to have an infinite p-class field tower (for p odd). Under an additional hypothesis, we refine this to a necessary and sufficient condition and describe an algorithm for evaluating this condition for a given quadratic imaginary number field.

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