ABSTRACT

Abstract Algebra: An Inquiry-Based Approach, Second Edition not only teaches abstract algebra, but also provides a deeper understanding of what mathematics is, how it is done, and how mathematicians think.

The second edition of this unique, flexible approach builds on the success of the first edition. The authors offer an emphasis on active learning, helping students learn algebra by gradually building both their intuition and their ability to write coherent proofs in context.

The goals for this text include:

  • Allowing the flexibility to begin the course with either groups or rings.
  • Introducing the ideas behind definitions and theorems to help students develop intuition.
  • Helping students understand how mathematics is done. Students will experiment through examples, make conjectures, and then refine or prove their conjectures.
  • Assisting students in developing their abilities to effectively communicate mathematical ideas.
  • Actively involving students in realizing each of these goals through in-class and out-of-class activities, common in-class intellectual experiences, and challenging problem sets.

Changes in the Second Edition

  • Streamlining of introductory material with a quicker transition to the material on rings and groups.
  • New investigations on extensions of fields and Galois theory.
  • New exercises added and some sections reworked for clarity.
  • More online Special Topics investigations and additional Appendices, including new appendices on other methods of proof and complex roots of unity.

Encouraging students to do mathematics and be more than passive learners, this text shows students the way mathematics is developed is often different than how it is presented; definitions, theorems, and proofs do not simply appear fully formed; mathematical ideas are highly interconnected; and in abstract algebra, there is a considerable amount of intuition to be found.

chapter I|54 pages

Number Systems

chapter 2Investigation 1|20 pages

The Integers

chapter Investigation 2|18 pages

Equivalence Relations and Z n

chapter Investigation 3|14 pages

Algebra in Other Number Systems

chapter II|60 pages

Rings

chapter 56Investigation 4|12 pages

Introduction to Rings

chapter Investigation 5|14 pages

Integer Multiples and Exponents

chapter Investigation 6|16 pages

Subrings, Extensions, and Direct Sums

chapter Investigation 7|16 pages

Isomorphism and Invariants

chapter III|72 pages

Polynomial Rings

chapter 116Investigation 8|12 pages

Polynomial Rings

chapter Investigation 9|14 pages

Divisibility in Polynomial Rings

chapter Investigation 10|12 pages

Roots, Factors, and Irreducible Polynomials

chapter Investigation 11|16 pages

Irreducible Polynomials

chapter Investigation 12|16 pages

Quotients of Polynomial Rings

chapter IV|56 pages

More Ring Theory

chapter 188Investigation 13|22 pages

Ideals and Homomorphisms

chapter Investigation 14|12 pages

Divisibility and Factorization in Integral Domains

chapter Investigation 15|20 pages

From Z to C

chapter V|200 pages

Group

chapter 244Investigation 16|12 pages

Symmetry

chapter Investigation 17|12 pages

An Introduction to Groups

chapter Investigation 18|8 pages

Integer Powers of Elements in a Group

chapter Investigation 19|14 pages

Subgroups

chapter Investigation 20|8 pages

Subgroups of Cyclic Groups

chapter Investigation 21|8 pages

The Dihedral Groups

chapter Investigation 22|14 pages

The Symmetric Groups

chapter Investigation 23|12 pages

Cosets and Lagrange's Theorem

chapter Investigation 24|22 pages

Normal Subgroups and Quotient Groups

chapter Investigation 25|12 pages

Products of Groups

chapter Investigation 26|24 pages

Group Isomorphisms and Invariants

chapter Investigation 27|14 pages

Homomorphisms and Isomorphism Theorems

chapter Investigation 28|14 pages

The Fundamental Theorem of Finite Abelian Groups

chapter Investigation 29|14 pages

The First Sylow Theorem

chapter Investigation 30|10 pages

The Second and Third Sylow Theorems

chapter VI|76 pages

Fields and Galois Theory

chapter 444Investigation 31|16 pages

Finite Fields, the Group of Units in Z n , and Splitting Fields

chapter Investigation 32|28 pages

Extensions of Fields

chapter Investigation 33|30 pages

Galois Theory