This introduction to modern or abstract algebra addresses the conventional topics of groups, rings, and fields with symmetry as a unifying theme, while it introduces readers to the active practice of mathematics. Its accessible presentation is designed to teach users to think things through for themselves and change their view of mathematics from a system of rules and procedures, to an arena of inquiry. The volume provides plentiful exercises that give users the opportunity to participate and investigate algebraic and geometric ideas which are interesting, important, and worth thinking about. The volume addresses algebraic themes, basic theory of groups and products of groups, symmetries of polyhedra, actions of groups, rings, field extensions, and solvability and isometry groups. For those interested in a concrete presentation of abstract algebra.
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This introduction to modern or abstract algebra addresses the conventional topics of groups, rings, and fields with symmetry as a unifying theme, while it introduces readers to the active practice of mathematics. Its accessible presentation is designed to teach users to think things through for themselves and change their view of mathematics from a system of rules and procedures, to an arena of inquiry. The volume provides plentiful exercises that give users the opportunity to participate and investigate algebraic and geometric ideas which are interesting, important, and worth thinking about. The volume addresses algebraic themes, basic theory of groups and products of groups, symmetries of polyhedra, actions of groups, rings, field extensions, and solvability and isometry groups. For those interested in a concrete presentation of abstract algebra.
Excerpt. © Reprinted by permission. All rights reserved.
This text is an introduction to "modern" or "abstract" algebra for undergraduate students. The book addresses the conventional topics; groups, rings, and fields, with symmetry as a unifying theme. This subject matter is central and ubiquitous in modern mathematics and in applications ranging from quantum physics to digital communications.
The most important goal of this book is to engage students in the active practice of mathematics. Students are given the opportunity to participate and investigate, starting on the first page. Exercises are plentiful, and working exercises should be the heart of the course.
This text provides a thorough introduction to abstract algebra at a level suitable for upper-level undergraduates. The text would also be useful for an undergraduate topics course (for example, on geometric aspects of group theory or on Galois theory).
The required background for using this text is a standard first course in linear algebra. I have included a brief summary of linear algebra in an appendix to help students review. I have also provided appendices on sets, logic, mathematical induction, and complex numbers. The instructor may wish to go through this "corequisite" material systematically, or to dip into it from time to time as needed. It might also be useful to recommend a short supplementary text on set theory, logic, and proofs to be used as a reference and aid; several such texts are currently available.
The text is adaptable to different teaching styles. My own preference is increasingly to lecture little, and to use class time for discussing problems. But those who wish to present the material in systematic lectures will find the subject matter cleanly organized and presented in the text. I offer one piece of pedagogical advice both to instructors and students: This stuff takes time, give it the time it needs. Students have an enormous amount to learn "between the lines" of the text. They not only have to learn the mathematics, but they need to learn how mathematics is done, how to read and write mathematics, and how to approach solving problems. They need to learn to tinker, to try examples, to formulate and solve a simpler problem, to try a special case, to think about analogies, to guess at intermediate results, and so on. It is important for the instructor to slow the pace of the course in order to encourage exploration, and it is important for the student to devote the (many) hours which are actually needed to absorb the material and to solve the problems.
The subject treated in this text is usually called abstract algebra. In common language, abstract means both "difficult" and "impractical," and it is a little unfortunate to start out by labeling the subject as hard but useless! It won't be out of place here to make some (encouraging) remarks about abstraction. It tikes some effort to remember that even the counting numbers were once (and in principle still are) an enormous abstraction. But they are familiar, they no longer seem difficult, and no one would doubt their usefulness. Abstractions with which we have become familiar eventually lose their aura of abstractness, but those with which we are not yet familiar seem abstract indeed. So it is with the ideas of this course. They may seem abstract today, but as they become familiar they will seem more concrete.
Mathematics involves a continual interplay between the abstract and the concrete: Abstraction is necessary in order to understand concrete phenomena, and concrete phenomena are necessary in order to understand the abstractions. Meanwhile, as one continues to study mathematics the perceived boundary between the abstract and concrete inevitably shifts.
Organization.
The text has been substantially revised for this second edition. The most important innovation is the long introductory chapter, entitled "Algebraic Themes," which treats many of the more elementary topics—symmetries, the integers, modular arithmetic, polynomials, and permutations—and introduces the important algebraic objects—groups, rings and fields—that are the subject of the rest of the book. The chapter also contains new sections on counting and cryptography. Chapter 6, on rings has been expanded, with a more complete discussion of Euclidean, principal ideal, and unique factorization domains. The classification of finite abelian groups has been moved to Chapter 3, on products of groups, and a section on vector spaces and bases has, appropriately, been added to this chapter. There is a new appendix containing a review of linear algebra (Appendix E).
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Most Helpful Customer Reviews
4 of 7 people found the following review helpful:
3.0 out of 5 stars
eh,
By chicken head cut off "mcscientist" (Gainesville/Orsay France) - See all my reviews
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This review is from: Algebra: Abstract and Concrete (Hardcover)
We used it in my first course. I missed the book after it was stolen because it is easy and decently entertaining to read. I remember being bothered by the 'proof left as excercise' bits there are maybe too many for a first course...otherwise fairly content with it... This is a gentle start to real algebra. Afterwards, like post first semester, I would use something like lang herstein or van der waerden (if they still print it).
0 of 1 people found the following review helpful:
3.0 out of 5 stars
Poor examples,
This review is from: Algebra: Abstract and Concrete (Stressing Symmetry) (2nd Edition) (Hardcover)
Personally, I do not like this book at all. The idea is you teach yourself, which may appeal to some people, but not to me. Why should I teach myself when I'm paying tuition? The book gives you a few very obvious facts, then expects you to build everything up yourself. This ends up a) being a lot of work or b) making the exercises very difficult because you've missed all the middle ground. Not my style.
3 of 6 people found the following review helpful:
2.0 out of 5 stars
Hard to follow...,
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This review is from: Algebra: Abstract and Concrete (Stressing Symmetry) (2nd Edition) (Hardcover)
Personally, as an undergraduate, I do not like this book at all... It leaves a lot of important proofs to the reader which is not helpful when first learning Abstract. Plus definitions and concepts are not clearly states, a lot is "assumed." All in all, I would go for another book, or at least two supplements...
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