Lectures on formally real fields

Alexander Prestel

Absolute values and their completions - like the p-adic number fields- play an important role in number theory. Krull's generalization of absolute values to valuations made applications in other branches of mathematics, such as algebraic geometry, possible. In valuation theory, the notion of a completion has to be replaced by that of the so-called Henselization. In this book, the theory of valuations as well as of Henselizations is developed. The presentation is based on the knowledge aquired in a standard graduate course in algebra. The last chapter presents three applications of the general theory -as to Artin's Conjecture on the p-adic number fields- that could not be obtained by the use of absolute values only.

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  • Orderings and semiorderings of fields.- Quadratic forms over formally real fields.- Real algebraic closures.- Some notions from model theory.- The transfer-principle for real closed fields.- The space of orderings and semiorderings.- Real places.- Real henselian fields.- SAP-fields.- Quadratic forms over formally real fields.

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書名 Lectures on formally real fields
著作者等 Prestel, Alexander
シリーズ名 Lecture notes in mathematics
出版元 Springer-Verlag
刊行年月 1984
版表示 [2nd ed.]
ページ数 xi, 125 p.
大きさ 25 cm
ISBN 0387138854
NCID BA03291388
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言語 英語
出版国 ドイツ