Algèbres d'opérateurs : Séminaire sur les algèbres d'opérateurs, Les Plans-sur-Bex, Suisse, 13-18 mars 1978
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Bibliographic Information
Algèbres d'opérateurs : Séminaire sur les algèbres d'opérateurs, Les Plans-sur-Bex, Suisse, 13-18 mars 1978
(Lecture notes in mathematics, 725)
Springer-Verlag, 1979
- : Berlin
- : New York
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Library & Science Information Center, Osaka Prefecture University
: BerlinNDC8:410.8||||10007177187
Note
Conference organized by P.L. Aubert, R. Bader, and P. de La Harpe
Includes bibliographies
Description and Table of Contents
- Volume
-
: New York ISBN 9780387095127
Description
Naked-eye comets are far from uncommon. As a rough average, one appears every 18 months or thereabouts, and it is not very unusual to see more than two in a single year. The record so far seems to have been 2004, with a total of five comets visible without optical aid. But 2006, 1970, and 1911 were not far behind with a total of four apiece. Yet, the majority of these pass unnoticed by the general public. Most simply look like fuzzy stars with tails that are either faint or below the naked-eye threshold. The 'classical' comet - a bright star-like object with a long flowing tail - is a sight that graces our skies about once per decade, on average. These 'great comets' are surely among the most beautiful objects that we can see in the heavens, and it is no wonder that they created such fear in earlier times. Just what makes a comet ''great'' is not easy to define. It is neither just about brightness nor only a matter of size. Some comets can sport prodigiously long tails and yet not be regarded as great. Others can become very bright, but hardly anyone other than a handful of enthusiastic astronomers will ever see them. Much depends on their separation from the Sun, the intensity of the tail, and so forth.
Table of Contents
- The Nature of Comets.- Halley#x2019
- s Comet Through the Ages.- The Greatest Comets of Ancient Times.- The Greatest Comets from A.D. 1000 to 1800.- The Greatest Comets from 1800 to Present Times.- Kamikaze Comets: The Kreutz Sungrazers.- Daylight Comets.
- Volume
-
: Berlin ISBN 9783540095125
Table of Contents
Quelques applications des C*-algebres et des algebres de von Neumann a l'etude des representations des groupes.- Projecteurs dans U(G) : un exemple.- Sur la theorie non commutative de l'integration.- Application de la K-theorie algebrique aux C*-algebres.- A density theorem for left Hilbert algebras.- Initiation a l'algebre de Calkin.- Moyennabilite du groupe unitaire et propriete P de Schuartz des algebres de von Neumann.- Characterization and norms of derivations on von Neumann algebras.- An invariant for group actions.- K-theorie algebrique de certaines algebres d'operateurs.- Automorphic group representations : The hyperfinite II1 factor and the Weyl algebra.
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