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The Kaplansky radical of a quadratic field extension

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2014

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Leep, David B.

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https://doi.org/10.1016/j.jpaa.2013.12.009
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Journal of Pure and Applied Algebra. 2014, 218(9), pp. 1577-1582. ISSN 0022-4049. eISSN 1873-1376. Available under: doi: 10.1016/j.jpaa.2013.12.009

Zusammenfassung

The radical of a field consists of all nonzero elements that are represented by every binary quadratic form representing 1. Here, the radical is studied in relation to local–global principles, and further in its behavior under quadratic field extensions. In particular, an example of a quadratic field extension is constructed where the natural analogue to the square-class exact sequence for the radical fails to be exact. This disproves a conjecture of Kijima and Nishi.

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Fachgebiet (DDC)
510 Mathematik

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ISO 690BECHER, Karim Johannes, David B. LEEP, 2014. The Kaplansky radical of a quadratic field extension. In: Journal of Pure and Applied Algebra. 2014, 218(9), pp. 1577-1582. ISSN 0022-4049. eISSN 1873-1376. Available under: doi: 10.1016/j.jpaa.2013.12.009
BibTex
@article{Becher2014Kapla-29349,
  year={2014},
  doi={10.1016/j.jpaa.2013.12.009},
  title={The Kaplansky radical of a quadratic field extension},
  number={9},
  volume={218},
  issn={0022-4049},
  journal={Journal of Pure and Applied Algebra},
  pages={1577--1582},
  author={Becher, Karim Johannes and Leep, David B.}
}
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