Seller: GreatBookPrices, Columbia, MD, U.S.A.
Condition: As New. Unread book in perfect condition.
Seller: Ria Christie Collections, Uxbridge, United Kingdom
£ 117.36
Quantity: Over 20 available
Add to basketCondition: New. In.
Condition: Good. Good condition. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains.
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
£ 117.35
Quantity: Over 20 available
Add to basketCondition: New.
Seller: GreatBookPrices, Columbia, MD, U.S.A.
Condition: New.
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
£ 130.12
Quantity: Over 20 available
Add to basketCondition: As New. Unread book in perfect condition.
Seller: Revaluation Books, Exeter, United Kingdom
Paperback. Condition: Brand New. reprint edition. 179 pages. 9.50x6.50x0.50 inches. In Stock.
Language: English
Published by Springer New York, Springer US, 2011
ISBN 10: 1461281911 ISBN 13: 9781461281917
Seller: AHA-BUCH GmbH, Einbeck, Germany
Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - This book deals with various systems of 'numbers' that can be constructed by adding 'imaginary units' to the real numbers. The complex numbers are a classical example of such a system. One of the most important properties of the complex numbers is given by the identity (1) Izz'l = Izl Iz'I It says, roughly, that the absolute value of a product is equal to the product of the absolute values of the factors. If we put z = al + a2i, z' = b+ bi, 1 2 then we can rewrite (1) as The last identity states that 'the product of a sum of two squares by a sum of two squares is a sum of two squares. ' It is natural to ask if there are similar identities with more than two squares, and how all of them can be described. Already Euler had given an example of an identity with four squares. Later an identity with eight squares was found. But a complete solution of the problem was obtained only at the end of the 19th century. It is substantially true that every identity with n squares is linked to formula(1), except that z and z' no longer denote complex numbers but more general 'numbers' where i,j, . . . , I are imaginary units. One of the main themes of this book is the establishing of the connection between identities with n squares and formula (1).
Seller: Anybook.com, Lincoln, United Kingdom
Condition: Good. This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. In good all round condition. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,550grams, ISBN:0387969802.
Seller: Mispah books, Redhill, SURRE, United Kingdom
Hardcover. Condition: Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book.
Published by New York, Berlin, Heidelberg, London usw.: Springer-Verlag, 1989
ISBN 10: 0387969802 ISBN 13: 9780387969800
Seller: Kunze, Gernot, Versandantiquariat, Falkensee, Germany
First Edition
X, 169 Seiten, Fadenheftung, Format 16 x 24,2 cm, hartgebundener u. glanzkaschierter Original-Pappband. * Zweite ISBN: 3-540-96980-2. Erhaltung: Keine Mängel, praktisch wie neu [Eine größere Sammlung Physik, Mathematik, Astronomie und verwandte Gebiete wird derzeit in den Bestand eingearbeitet. Sie finden diese Titel bei uns in den gleichnamigen Rubriken]. Sprache: Englisch.