Kirjojen hintavertailu. Mukana 11 244 527 kirjaa ja 12 kauppaa.

Kirjahaku

Etsi kirjoja tekijän nimen, kirjan nimen tai ISBN:n perusteella.

1000 tulosta hakusanalla K. C. Rahmanowa

K-Theory for Group C*-Algebras and Semigroup C*-Algebras

K-Theory for Group C*-Algebras and Semigroup C*-Algebras

Joachim J. R. Cuntz

Birkhauser Verlag AG
2017
nidottu
This book gives an account of the necessary background for group algebras and crossed products for actions of a group or a semigroup on a space and reports on some very recently developed techniques with applications to particular examples. Much of the material is available here for the first time in book form. The topics discussed are among the most classical and intensely studied C*-algebras. They are important for applications in fields as diverse as the theory of unitary group representations, index theory, the topology of manifolds or ergodic theory of group actions.Part of the most basic structural information for such a C*-algebra is contained in its K-theory. The determination of the K-groups of C*-algebras constructed from group or semigroup actions is a particularly challenging problem. Paul Baum and Alain Connes proposed a formula for the K-theory of the reduced crossed product for a group action that would permit, in principle, its computation. By work of many hands, the formula has by now been verified for very large classes of groups and this work has led to the development of a host of new techniques. An important ingredient is Kasparov's bivariant K-theory.More recently, also the C*-algebras generated by the regular representation of a semigroup as well as the crossed products for actions of semigroups by endomorphisms have been studied in more detail.Intriguing examples of actions of such semigroups come from ergodic theory as well as from algebraic number theory. The computation of the K-theory of the corresponding crossed products needs new techniques. In cases of interest the K-theory of the algebras reflects ergodic theoretic or number theoretic properties of the action.
K. C. F. Krauses Urbild Der Menschheit

K. C. F. Krauses Urbild Der Menschheit

Siegfried Pflegerl

Peter Lang AG
2003
nidottu
Das "Urbild der Menschheit" Karl Christian Friedrich Krauses (1781-1832) ist eingebettet in den progressiven universalistischen Essentialismus seiner Wesenlehre. Nach dem Kanon dieses Urbildes befinden sich die derzeitige Weltgesellschaft und ihre Untersysteme in Stadien der Pubertat und kennen nicht einmal den Zustand ihrer eigenen Reife. Eine Einfuhrung gibt Anleitungen fur eine Erweiterung der Erkenntnishorizonte bis zur Schau der goettlichen absoluten Essentialitat, in der sich bisher in Philosophie und Religion nicht erkannte Grundverhaltnisse zwischen Menschheit und Kosmos ergeben. Erst aus dieser Grundwissenschaft koennen auch die Kriterien fur die weitere globale Entwicklung der Menschheit und den Bau einer allharmonischen Menschheit (Urbild) in ihren Details erkannt werden. In diesem Urbild kreuzen sich auch Linien, die in andere Werke Krauses zur Rechtsphilosophie, Ethik, AEsthetik, Religionsphilosophie, Logik, Mathematik usw. fuhren, zu welchen Bezuge hergestellt werden. Die komplexen wissenschaftlichen, kunstlerischen, politischen, sozialen und kulturellen Aspekte der heutigen Weltgesellschaft werden mit dem Urbild verglichen, um damit eine Weiterbildung anzuregen. Die Untersuchung ist daher ein weit in die nachsten Jahrhunderte reichender Beitrag zur Globalisierungsdebatte mit bisher kaum beachteten neuen, universalistischen Perspektiven.
Equivariant K-Theory and Freeness of Group Actions on C*-Algebras

Equivariant K-Theory and Freeness of Group Actions on C*-Algebras

N. Christopher Phillips

Springer-Verlag Berlin and Heidelberg GmbH Co. K
1987
nidottu
Freeness of an action of a compact Lie group on a compact Hausdorff space is equivalent to a simple condition on the corresponding equivariant K-theory. This fact can be regarded as a theorem on actions on a commutative C*-algebra, namely the algebra of continuous complex-valued functions on the space. The successes of "noncommutative topology" suggest that one should try to generalize this result to actions on arbitrary C*-algebras. Lacking an appropriate definition of a free action on a C*-algebra, one is led instead to the study of actions satisfying conditions on equivariant K-theory - in the cases of spaces, simply freeness. The first third of this book is a detailed exposition of equivariant K-theory and KK-theory, assuming only a general knowledge of C*-algebras and some ordinary K-theory. It continues with the author's research on K-theoretic freeness of actions. It is shown that many properties of freeness generalize, while others do not, and that certain forms of K-theoretic freeness are related to other noncommutative measures of freeness, such as the Connes spectrum. The implications of K-theoretic freeness for actions on type I and AF algebras are also examined, and in these cases K-theoretic freeness is characterized analytically.
K-Theory and C*-Algebras: A Friendly Approach

K-Theory and C*-Algebras: A Friendly Approach

N. E. Wegge-Olsen

Oxford University Press
1993
sidottu
K-theory is often considered a complicated `specialist's' theory. This book is an introduction to the basics and provides detailed explanation of the various concepts required for a deeper understanding of the subject. Some familiarity with basic C*algebra theory is assumed and then follows a careful construction and analysis of the operator K-theory groups and proof of the results of K-theory, including Bott periodicity. Of specific interest to algebraists and geometrists, the book aims to give full instruction. No details are left out in the presentation and many instructive and generously hinted exercises are provided. Apart from K-theory, this book offers complete and self contained expositions of important advanced C*-algebraic constructions like tensor products, multiplier algebras and Hilbert modules.
K.C. and the Giant

K.C. and the Giant

Jeannie Visootsak; Deslie Quinby

Deslie Quinby
2018
nidottu
The world is ready for a hero with Down syndrome - K.C. is that hero. Using only imagination, empathy, and courage, K.C. faces challenges, saves the day, and makes new friends along the way. Down syndrome does not define our hero, but servers to remind us that hero's come in many shapes and sizes. This time K.C. journeys far to a land where a town is afraid of a giant. K.C. uses smarts, heroics and heart to once again save the day.
K.C. and the Dragon

K.C. and the Dragon

Jeannie Visootsak; Deslie Quinby

Deslie Quinby
2018
nidottu
The world is ready for a hero with Down syndrome - K.C. is that hero. Using only imagination, empathy, and courage, K.C. faces challenges, saves the day, and makes new friends along the way. Down syndrome does not define our hero, but servers to remind us that hero's come in many shapes and sizes.Follow K.C. through the second adventure where K.C. makes new friends while rescuing a pink polka-dotted island from a fiercely hungry dragon