Background
COHN, Paul was born on January 8, 1924 in Hamburg, Germany. Son of James and Julia (nee Cohen) Cohn.
(The present book was conceived as an introduction for the...)
The present book was conceived as an introduction for the user of universal algebra, rather than a handbook for the specialist, but when the first edition appeared in 1965, there were practically no other books entir~ly devoted to the subject, whether introductory or specialized. Today the specialist in the field is well provided for, but there is still a demand for an introduction to the subject to suit the user, and this seemed to justify a reissue of the book. Naturally some changes have had to be made; in particular, I have corrected all errors that have been brought to my notice. Besides errors, some obscurities in the text have been removed and the references brought up to date. I should like to express my thanks to a number of correspondents for their help, in particular C. G. d'Ambly, W. Felscher, P. Goralcik, P. J. Higgins, H.-J. Hoehnke, J. R. Isbell, A. H. Kruse, E. J. Peake, D. Suter, J. S. Wilson. But lowe a special debt to G. M. Bergman, who has provided me with extensive comments. particularly on Chapter VII and the supplementary chapters. I have also con sulted reviews of the first edition, as well as the Italian and Russian translations.
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(This volume presents a thorough discussion of systems of ...)
This volume presents a thorough discussion of systems of linear equations and their solutions. Vectors and matrices are introduced as required and an account of determinants is given. Great emphasis has been placed on keeping the presentation as simple as possible, with many illustrative examples. While all mathematical assertions are proved, the student is led to view the mathematical content intuitively, as an aid to understanding. The text treats the coordinate geometry of lines, planes and quadrics, provides a natural application for linear algebra and at the same time furnished a geometrical interpretation to illustrate the algebraic concepts.
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(Algebraists have studied noncommutative fields (also call...)
Algebraists have studied noncommutative fields (also called skew fields or division rings) less thoroughly than their commutative counterparts. Most existing accounts have been confined to division algebras, i.e. skew fields that are finite dimensional over their center. This work offers the first comprehensive account of skew fields. It is based on the author's LMS Lecture Note Volume "Skew Field Constructions". The axiomatic foundation and a precise description of the embedding problem precedes an account of algebraic and topological construction methods. The author presents his general embedding theory with full proofs, leading to the construction of skew fields. The author has simplified his treatment of equations over skew fields and has extended it by the use of matrix methods. A separate chapter describes valuations and orderings on skew fields, with a construction applicable to free fields. Numerous exercises test the reader's understanding, presenting further aspects and open problems in concise form. Notes and comments at the end of chapters provide historical background. The book will appeal to researchers in algebra, logic, and algebraic geometry, as well as graduate students in these fields.
http://www.amazon.com/gp/product/0521062942/?tag=2022091-20
(Algebraists have studied noncommutative fields (also call...)
Algebraists have studied noncommutative fields (also called skew fields or division rings) less thoroughly than their commutative counterparts. Most existing accounts have been confined to division algebras, i.e. skew fields that are finite dimensional over their center. This work offers the first comprehensive account of skew fields. It is based on the author's LMS Lecture Note Volume "Skew Field Constructions". The axiomatic foundation and a precise description of the embedding problem precedes an account of algebraic and topological construction methods. The author presents his general embedding theory with full proofs, leading to the construction of skew fields. The author has simplified his treatment of equations over skew fields and has extended it by the use of matrix methods. A separate chapter describes valuations and orderings on skew fields, with a construction applicable to free fields. Numerous exercises test the reader's understanding, presenting further aspects and open problems in concise form. Notes and comments at the end of chapters provide historical background. The book will appeal to researchers in algebra, logic, and algebraic geometry, as well as graduate students in these fields.
http://www.amazon.com/gp/product/0521432170/?tag=2022091-20
(A clear and structured introduction to the subject. After...)
A clear and structured introduction to the subject. After a chapter on the definition of rings and modules there are brief accounts of Artinian rings, commutative Noetherian rings and ring constructions, such as the direct product, Tensor product and rings of fractions, followed by a description of free rings. Readers are assumed to have a basic understanding of set theory, group theory and vector spaces. Over two hundred carefully selected exercises are included, most with outline solutions.
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( Here is the second volume of a revised edition of P.M. ...)
Here is the second volume of a revised edition of P.M. Cohn's classic three-volume text Algebra, widely regarded as one of the most outstanding introductory algebra textbooks. Volume Two focuses on applications. The text is supported by worked examples, with full proofs, there are numerous exercises with occasional hints, and some historical remarks.
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(Proving that a polynomial ring in one variable over a fie...)
Proving that a polynomial ring in one variable over a field is a principal ideal domain can be done by means of the Euclidean algorithm, but this does not extend to more variables. However, if the variables are not allowed to commute, giving a free associative algebra, then there is a generalization, the weak algorithm, which can be used to prove that all one-sided ideals are free. This book presents the theory of free ideal rings (firs) in detail. There is also a full account of localization which is treated for general rings but the features arising in firs are given special attention.
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(Fundamental to all areas of mathematics, algebra provides...)
Fundamental to all areas of mathematics, algebra provides the cornerstone for the studenta s development. The concepts are often intuitive, but some can take years of study to fully absorb. For over twenty years, the authora s classic three--volume set, Algebra, has been regarded by many as the most outstanding introductory work available. This work, Classic Algebra, combines a fully updated Volume 1 with the essential topics from Volumes 2 and 3, and provides a self--contained introduction to the subject.
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( "A tour de force. If you read this book, you'll never l...)
"A tour de force. If you read this book, you'll never look at other people in quite the same way again."--Malcolm Gladwell Renowned psychologist Paul Ekman explains the roots of our emotions--anger, fear, disgust, sadness, and happiness--and shows how they cascade across our faces, providing clear signals to those who can identify the clues. As featured in Malcolm Gladwell's bestseller Blink, Ekman's Facial Action Coding System offers intense training in recognizing feelings in spouses, children, colleagues, even strangers on the street. In Emotions Revealed, Ekman distills decades of research into a practical, mind-opening, and life-changing guide to reading the emotions of those around us. He answers such questions as: How does our body signal to others whether we are slightly sad or anguished, peeved or enraged? Can we learn to distinguish between a polite smile and the genuine thing? Can we ever truly control our emotions? Packed with unique exercises and photographs, and a new chapter on emotions and lying that encompasses security and terrorism as well as gut decisions, Emotions Revealed is an indispensable resource for navigating our emotional world.
http://www.amazon.com/gp/product/0805083391/?tag=2022091-20
( "A tour de force. If you read this book, you'll never l...)
"A tour de force. If you read this book, you'll never look at other people in quite the same way again."--Malcolm Gladwell Renowned psychologist Paul Ekman explains the roots of our emotions--anger, fear, disgust, sadness, and happiness--and shows how they cascade across our faces, providing clear signals to those who can identify the clues. As featured in Malcolm Gladwell's bestseller Blink, Ekman's Facial Action Coding System offers intense training in recognizing feelings in spouses, children, colleagues, even strangers on the street. In Emotions Revealed, Ekman distills decades of research into a practical, mind-opening, and life-changing guide to reading the emotions of those around us. He answers such questions as: How does our body signal to others whether we are slightly sad or anguished, peeved or enraged? Can we learn to distinguish between a polite smile and the genuine thing? Can we ever truly control our emotions? Packed with unique exercises and photographs, and a new chapter on emotions and lying that encompasses security and terrorism as well as gut decisions, Emotions Revealed is an indispensable resource for navigating our emotional world.
http://www.amazon.com/gp/product/0805083391/?tag=2022091-20
( This is the first volume of a revised edition of P.M. C...)
This is the first volume of a revised edition of P.M. Cohn's classic three-volume text Algebra, widely regarded as one of the most outstanding introductory algebra textbooks. This volume covers the important results of algebra. Readers should have some knowledge of linear algebra, groups and fields, although all the essential facts and definitions are recalled.
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(This book brings together five papers that have been infl...)
This book brings together five papers that have been influential in the study of Lie groups. Though published more than 20 years ago, these papers made fundamental contributions that deserve much broader exposure. In addition, the subsequent literature that has subsumed these papers cannot replace the originality and vitality they contain. The editors have provided a brief introduction to each paper, as well as a synopsis of the major developments which have occurred in the area covered by each paper. Included here are the doctoral theses of Arthur, Osborne, and Schmid. Arthur's thesis is closely related to Trombi's paper insofar as both deal with harmonic analysis on real semisimple Lie groups, and, in particular, analysis on the Schwartz space of Harish-Chandra. Arthur's thesis is concerned with the image under the Fourier transform of the Schwartz space of a semisimple Lie group of real rank one, while Trombi's paper provides an expository account of the harmonic analysis associated to the decomposition of the Schwartz space under the regular representation. In his thesis, Osborne extends the Atiyah-Bott fixed point theorem for elliptic complexes to obtain a fixed point formula for complexes that are not elliptic. Schmid proves a generalization of the Borel-Weil theorem concerning an explicit and geometric realization of the irreducible representations of a compact, connected semisimple Lie group. Langlands's fundamental paper provides a classification of irreducible, admissible representations of real reductive Lie groups.
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(Paul Tripp uncovers the heart issues that affect parents ...)
Paul Tripp uncovers the heart issues that affect parents and their teenage children during the often-chaotic adolescent years. With wit, wisdom, humility, and compassion, he shows parents how to seize the countless opportunities to deepen communication and learn and grow with their teens.
http://www.amazon.com/gp/product/0875526055/?tag=2022091-20
(Paul Tripp uncovers the heart issues that affect parents ...)
Paul Tripp uncovers the heart issues that affect parents and their teenage children during the often-chaotic adolescent years. With wit, wisdom, humility, and compassion, he shows parents how to seize the countless opportunities to deepen communication and learn and grow with their teens.
http://www.amazon.com/gp/product/0875526055/?tag=2022091-20
COHN, Paul was born on January 8, 1924 in Hamburg, Germany. Son of James and Julia (nee Cohen) Cohn.
Bachelor, Cambridge University, England, 1948. Master of Arts, Doctor of Philosophy, Cambridge University, England, 1951.
Lecturer, University of Manchester 1952-1962. Visiting Professor, Yale University 1961-1962. Reader, Queen Mary College, London 1963-1967.
Visiting Professor University of Chicago 1964. Professor, and Head, Department, of Mathematics, Bedford College, London 1967-1984. Professor, University College, London 1984-1989, Astor Professor, of Mathematics 1986-1989, Professor Emeritus and Honorary Research Fellow since 1989.
President London Mathematical Society 1982-1984.
(The present book was conceived as an introduction for the...)
(Proving that a polynomial ring in one variable over a fie...)
(Algebraists have studied noncommutative fields (also call...)
(Algebraists have studied noncommutative fields (also call...)
(Paul Tripp uncovers the heart issues that affect parents ...)
(Paul Tripp uncovers the heart issues that affect parents ...)
(Fundamental to all areas of mathematics, algebra provides...)
(This volume presents a thorough discussion of systems of ...)
(1999 copyright Teacher's Edition, also compatible with th...)
(This book brings together five papers that have been infl...)
(1999 copyright; also compatible with the 1994, 1990, 1984...)
( Here is the second volume of a revised edition of P.M. ...)
(A clear and structured introduction to the subject. After...)
( This is the first volume of a revised edition of P.M. C...)
(2006 copyright 'Classics' Teacher's Edition)
( "A tour de force. If you read this book, you'll never l...)
( "A tour de force. If you read this book, you'll never l...)
(Book by Cohn, P. M.)
Author: Lie Groups, 1957, Universal Algebra, 1965, second edition, 1981, Free Rings and Their Relations, 1971, second edition, 1985, Russian translation, 1975, Algebra, 3 vols., 1982, 1989-1990, Elements of Linear Algebra, 1994, Skew Fields, 1995, Introduction to Ring Theory, 2000, Classic Algebra, 2000, Basic Algebra, 2002, Further Algebra, 2003, Free Ideal Rings and Localization in General Rings, 2006. Contributor articles to professional journals.
Fellow Royal Society (council 1985-1987). Member London Mathematics Society (editor monographs 1967-1977, 80-93, council 1965-1984, president 1982-1984, Berwick prize 1974), American Mathematics Society, Mathematics Association American (L.R. Ford award 1972).
Reading, music, language in all its forms.
Married Deirdre Sonia Sharon, March 27, 1958. Children: Susan Juliet, Ursula Yael.