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Author: S.M. Gersten
Publisher: Springer Science & Business Media
ISBN: 1461395860
Category : Mathematics
Languages : en
Pages : 346
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Book Description
Essays in Group Theory contains five papers on topics of current interest which were presented in a seminar at MSRI, Berkeley in June, 1985. Special mention should be given to Gromov`s paper, one of the most significant in the field in the last decade. It develops the theory of hyperbolic groups to include a version of small cancellation theory sufficiently powerful to recover deep results of Ol'shanskii and Rips. Each of the remaining papers, by Baumslag and Shalen, Gersten, Shalen, and Stallings contains gems. For example, the reader will delight in Stallings' explicit construction of free actions of orientable surface groups on R-trees. Gersten's paper lays the foundations for a theory of equations over groups and contains a very quick solution to conjugacy problem for a class of hyperbolic groups. Shalen's article reviews the rapidly expanding theory of group actions on R-trees and the Baumslag-Shalen article uses modular representation theory to establish properties of presentations whose relators are pth-powers.
Author: S.M. Gersten
Publisher: Springer Science & Business Media
ISBN: 1461395860
Category : Mathematics
Languages : en
Pages : 346
Get Book Here
Book Description
Essays in Group Theory contains five papers on topics of current interest which were presented in a seminar at MSRI, Berkeley in June, 1985. Special mention should be given to Gromov`s paper, one of the most significant in the field in the last decade. It develops the theory of hyperbolic groups to include a version of small cancellation theory sufficiently powerful to recover deep results of Ol'shanskii and Rips. Each of the remaining papers, by Baumslag and Shalen, Gersten, Shalen, and Stallings contains gems. For example, the reader will delight in Stallings' explicit construction of free actions of orientable surface groups on R-trees. Gersten's paper lays the foundations for a theory of equations over groups and contains a very quick solution to conjugacy problem for a class of hyperbolic groups. Shalen's article reviews the rapidly expanding theory of group actions on R-trees and the Baumslag-Shalen article uses modular representation theory to establish properties of presentations whose relators are pth-powers.
Author: Brian Hayes
Publisher: Macmillan + ORM
ISBN: 1429938579
Category : Mathematics
Languages : en
Pages : 284
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Book Description
“A refreshing collection of superb mathematical essays . . . from choosing up sides to choosing names, the topics are intriguingly nonstandard . . . First-rate.” —John Allen Paulos, author of Innumeracy A science and technology journalist and essayist whose work has appeared in multiple anthologies, Brian Hayes now presents a selection of his most memorable pieces—including the National Magazine Award–winning “Clock of Ages”—in this enjoyable volume. In addition, Hayes embellishes the collection with an overall scene-setting preface, reconfigured illustrations, and a refreshingly self-critical “Afterthoughts” section appended to each essay. “You don’t have to be a geek to appreciate Hayes’s lively, self-effacing style . . . The first essay explains how clockmakers developed the gears and linkages that enabled fabled medieval clocks to reach remarkable accuracy, as well as predict the day Easter would fall on. Other essays celebrate the notion of random numbers and why they are so hard to achieve. Numerical analysis also plays a role in economic models based on the kinetic theory of gases or simplified markets involving iterations of buying and selling. Hayes goes on to explain how statistics have been applied to compute which quarrels—from interpersonal to world wars—are the deadliest (surprising results here) . . . Challenging but rewarding for anyone intrigued by numbers.” —Kirkus Reviews “As much as any book I can name, Group Theory in the Bedroom conveys to a general audience the playfulness involved in doing mathematics: how questions arise as a form of play, how our first attempts at answering questions usually seem naive in hindsight but are crucial for finding eventual solutions, and how a good solution just feels right.” —David Austin, Notices of the AMS
Author: Armand Borel
Publisher: American Mathematical Soc.
ISBN: 0821802887
Category : Mathematics
Languages : en
Pages : 184
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Book Description
Algebraic groups and Lie groups are important in most major areas of mathematics, occuring in diverse roles such as the symmetries of differential equations and as central figures in the Langlands program for number theory. In this book, Professor Borel looks at the development of the theory of Lie groups and algebraic groups, highlighting the evolution from the almost purely local theory at the start to the global theory that we know today. As the starting point of this passagefrom local to global, the author takes Lie's theory of local analytic transformation groups and Lie algebras. He then follows the globalization of the process in its two most important frameworks: (transcendental) differential geometry and algebraic geometry. Chapters II to IV are devoted to the former,Chapters V to VIII, to the latter.The essays in the first part of the book survey various proofs of the full reducibility of linear representations of $SL 2M$, the contributions H. Weyl to representation and invariant theory for Lie groups, and conclude with a chapter on E. Cartan's theory of symmetric spaces and Lie groups in the large.The second part of the book starts with Chapter V describing the development of the theory of linear algebraic groups in the 19th century. Many of the main contributions here are due to E. Study, E. Cartan, and above all, to L. Maurer. After being abandoned for nearly 50 years, the theory was revived by Chevalley and Kolchin and then further developed by many others. This is the focus of Chapter VI. The book concludes with two chapters on various aspects of the works of Chevalley on Lie groupsand algebraic groups and Kolchin on algebraic groups and the Galois theory of differential fields.The author brings a unique perspective to this study. As an important developer of some of the modern elements of both the differential geometric and the algebraic geometric sides of the theory, he has a particularly deep appreciation of the underlying mathematics. His lifelong involvement and his historical research in the subject give him a special appreciation of the story of its development.
Author: Saul Bernstein
Publisher:
ISBN: 9780891820017
Category : Social group work
Languages : en
Pages : 136
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Book Description
Author: Thomas Hawkins
Publisher: Springer Science & Business Media
ISBN: 1461212022
Category : Mathematics
Languages : en
Pages : 578
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Book Description
The great Norwegian mathematician Sophus Lie developed the general theory of transformations in the 1870s, and the first part of the book properly focuses on his work. In the second part the central figure is Wilhelm Killing, who developed structure and classification of semisimple Lie algebras. The third part focuses on the developments of the representation of Lie algebras, in particular the work of Elie Cartan. The book concludes with the work of Hermann Weyl and his contemporaries on the structure and representation of Lie groups which serves to bring together much of the earlier work into a coherent theory while at the same time opening up significant avenues for further work.
Author: Thomas F. Pettigrew
Publisher: Psychology Press
ISBN: 1136794298
Category : Psychology
Languages : en
Pages : 354
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Book Description
Research and theory on intergroup contact have become one of the fastest advancing and most exciting fields in social psychology in recent years. The work is exciting because it combines basic social psychological concerns -- human interaction, situational influences on behavior -- with an effective means of improving intergroup relations at a time when the world is witnessing widespread intergroup hatred and strife. This volume provides an overview of this rapidly progressing area of investigation – its origins and early work, its current status and recent developments, along with criticisms of this work and suggestions for future directions. It covers a range of research findings involving contact between groups drawn from the authors’ extensive meta-analysis of 515 published studies on intergroup contact. This meta-analysis, together with the authors’ renowned research on intergroup contact, provides a solid foundation and broad overview of the field, to which have been added discussions of research extensions and emerging directions. When Groups Meet is a rich, comprehensive overview of classic and contemporary work on intergroup contact, and provides insights into where this work is headed in the future. For research specialists, this volume not only serves as a sourcebook for research and theory on intergroup contact, it also provides the entire 515-item bibliography from the meta-analysis. The clear structure and accessible writing style will also appeal to advanced undergraduate and graduate students in psychology and other social sciences.
Author: C. C. Graham
Publisher: Springer Science & Business Media
ISBN: 1461299764
Category : Mathematics
Languages : en
Pages : 483
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Book Description
This book considers various spaces and algebras made up of functions, measures, and other objects-situated always on one or another locally compact abelian group, and studied in the light of the Fourier transform. The emphasis is on the objects themselves, and on the structure-in-detail of the spaces and algebras. A mathematician needs to know only a little about Fourier analysis on the commutative groups, and then may go many ways within the large subject of harmonic analysis-into the beautiful theory of Lie group representations, for example. But this book represents the tendency to linger on the line, and the other abelian groups, and to keep asking questions about the structures thereupon. That tendency, pursued since the early days of analysis, has defined a field of study that can boast of some impressive results, and in which there still remain unanswered questions of compelling interest. We were influenced early in our careers by the mathematicians Jean-Pierre Kahane, Yitzhak Katznelson, Paul Malliavin, Yves Meyer, Joseph Taylor, and Nicholas Varopoulos. They are among the many who have made the field a productive meeting ground of probabilistic methods, number theory, diophantine approximation, and functional analysis. Since the academic year 1967-1968, when we were visitors in Paris and Orsay, the field has continued to see interesting developments. Let us name a few. Sam Drury and Nicholas Varopoulos solved the union problem for Helson sets, by proving a remarkable theorem (2.1.3) which has surely not seen its last use.
Author: Ludwig Von Mises
Publisher: Ludwig von Mises Institute
ISBN: 1610165128
Category : Philosophy
Languages : en
Pages : 74
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Book Description
Author: George Hull
Publisher: Lexington Books
ISBN: 149851572X
Category : Philosophy
Languages : en
Pages : 363
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Book Description
Equality is a widely championed social ideal. But what is equality? And what action is required if present-day societies are to root out their inequalities? The Equal Society collects fourteen philosophical essays, each with a fresh perspective on these questions. The authors explore the demands of egalitarian justice, addressing issues of distribution and rectification, but equally investigating what it means for people to be equals as producers and communicators of knowledge or as members of subcultures, and considering what it would take for a society to achieve gender and racial equality. The essays collected here address not just the theory but also the practice of equality, arguing for concrete changes in institutions such as higher education, the business corporation and national constitutions, to bring about a more equal society. The Equal Society offers original approaches to themes prominent in current social and political philosophy, including relational equality, epistemic injustice, the capabilities approach, African ethics, gender equality and the philosophy of race. It includes new work by respected social and political philosophers such as Ann E. Cudd, Miranda Fricker, Charles W. Mills, and Jonathan Wolff.
Author: S. N. Eisenstadt
Publisher: University of Chicago Press
ISBN: 9780226195568
Category : Social Science
Languages : en
Pages : 418
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Book Description
S. N. Eisenstadt is well known for his wide-ranging investigations of modernization, social stratification, revolution, comparative civilization, and political development. This collection of twelve major theoretical essays spans more than forty years of research, to explore systematically the bases of human action and society. Framed by a new introduction and an extensive epilogue, which are themselves important statements about processes of institutional formations and cultural creativity, the essays trace the major developments of contemporary sociological theory and analysis. Examining themes of trust and solidarity among immigrants, youth groups, and generations, and in friendships, kinships, and patron-client relationships, Eisenstadt explores larger questions of social structure and agency, conflict and change, and the reconstitution of the social order. He looks also at political and religious systems, paying particular attention to great historical empires and the major civilizations. United by what they reveal about three major dimensions of social life—power, trust, and meaning—these essays offer a vision of culture as both a preserving and a transforming aspect of social life, thus providing a new perspective on the relations between culture and social structure.
