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Valuations, Orderings, and Milnor \(K\)-Theory
Ido Efrat, Ben-Gurion University of the Negev, Be'er-Sheva, Israel

Mathematical Surveys and Monographs
2006; 288 pp; hardcover
Volume: 124
ISBN-10: 0-8218-4041-X
ISBN-13: 978-0-8218-4041-2
List Price: US$81
Member Price: US$64.80
Order Code: SURV/124
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This monograph is a comprehensive exposition of the modern theory of valued and ordered fields. It presents the classical aspects of such fields: their arithmetic, topology, and Galois theory. Deeper cohomological aspects are studied in its last part in an elementary manner. This is done by means of the newly developed theory of generalized Milnor \(K\)-rings. The book emphasizes the close connections and interplay between valuations and orderings, and to a large extent, studies them in a unified manner.

The presentation is almost entirely self-contained. In particular, the text develops the needed machinery of ordered abelian groups. This is then used throughout the text to replace the more classical techniques of commutative algebra. Likewise, the book provides an introduction to the Milnor \(K\)-theory.

The reader is introduced to the valuation-theoretic techniques as used in modern Galois theory, especially in applications to birational anabelian geometry, where one needs to detect valuations from their "cohomological footprints". These powerful techniques are presented here for the first time in a unified and elementary way.


Graduate students and research mathematicians interested in valuations and orderings on fields (algebra and number theory).


"This book provides a thorough and well-presented introduction to the valuations and orderings on a field, and developsa formalism of relative higher Milnor \(K\)-theory of fields."

-- Mathematical Reviews

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