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＜電子ブック＞
Lectures on Formally Real Fields / by A. Prestel
(Lecture Notes in Mathematics. ISSN:16179692 ; 1093)

版	1st ed. 1984.
出版者	(Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer)
出版年	1984
大きさ	XI, 128 p : online resource
著者標目	*Prestel, A author SpringerLink (Online service)
件　名	LCSH:Algebra LCSH:Mathematical logic FREE:Algebra FREE:Mathematical Logic and Foundations
一般注記	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 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 HTTP:URL=https://doi.org/10.1007/BFb0101548

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