Information concerning the course Mathematics 552 (Abstract Algebra II) taught in Spring 2017 by J. Tunnell is kept here. The course will be a continuation of Mathematics 551. It will meet Monday and Thursday 12:00-1:20 in Hill 423. The following information is currently available about this course.

### Text:

Jacobson, "Basic Algebra", Volumes 1 and 2, second edition. These volumes are currently available from Dover (www.doverpublications.com)

### Prerequisites:

Any standard course in abstract algebra for undergraduates and/or Math 551. It will be assumed that students understand the concepts of groups, rings, modules, vector space and linear algebra, and finitely generated modules over principal ideal domains.

### Description:

**Topics**: This is the continuation of Math 551, aimed at a discussion of many fundamental algebraic structures. The course will cover the following topics (and perhaps some others).

- Basic module theory and introductory homological algebra - most of Chapter 3 and part of Chapter 6 of Basic Algebra II: hom and tensor, projective and injective modules, abelian categories, resolutions, completely reducible modules, the Wedderburn-Artin theorem
- Commutative ideal theory and Noetherian rings - part of Chapter 7 of Basic Algebra II: rings of polynomials, localization, primary decomposition theorem, Dedekind domains, Noether normalization
- Galois Theory - Chapter 4 of Basic Algebra I and part of Chapter 8 of Basic Algebra II: algebraic and transcendental extensions, separable and normal extensions, the Galois group, solvability of equations by radicals

**Course Format:** There will be weekly homework assignments, and midterm and final exams.

**More Information:** Contact J. Tunnell in Hill 546, or email to tunnell@math>

Week 1

- Text Readings: Jacobson I:7.1-7.2, Jacobson II: 1.1-1.3 , 3.1, 3.7-3.9
- Week 1 Problem set 1 (Due 1/26/17)
- Week 1 expository reading:
- Read What is Algebra? from Algebra I by A. I. Kostrikin and I. R. Shafarevitch (Encyclopaedia of Mathematical Sciences Volume 11, Springer-Verlag ).
- Read When is one thing equal to some other thing? by B. Mazur
- Read about the role of algebra in applied mathematics

Week 2

- Text Readings: Jacobson 3.10
- Week 2 Problem set 2 (Due 2/2/17)
- Week 2 expository reading:
- Read Notes on exterior algebras and the Cauchy-Binet formula which are relevant to problem set 2
- Read Notes on when the tensor product of two elements equals 0 and do the exercise at the end.

Week 3

- Text Readings: Jacobson II: 3.2, 3.5
- Week 3 Problem set 3 (Due 2/16/17 -due to snowday 2/9)
- Week 3 expository reading:

Week 4

- Text Readings: Jacobson II: 4.1-4.4
- Week 4 Problem set 4 (Due 2/23/17)
- Week 4 expository reading:
- Read this centennial celebration article about group representations

Week 5

- Text Readings: Jacobson II: 4.5, 5.1, 5.2
- Week 5 Problem set 5 (Due 3/2/17)
- Week 5 expository reading:
- Read the second part of the centennial celebration article about group representations

- Oral Midterm exams will be 3/3, 3/6, 3/7. The possible times are listed here (available 9:00 AM 2/21/17). After you have chosen desired open time slots, email me your choices ranked by preference. I will update the available times as students are scheduled on a first come first served basis.

Week 6

- Text Readings: Jacobson II: 5.1, 5.2, 5.3
- Week 6 Problem set 6 (Due 3/9/17)

Week 7

- Text Readings: Wrapup of Semisimple rings and Representation Theory: Jacobson II: 5.1-5.3, 5.5, 5.6
- Week 7 Problem set 7 (Due 3/23/17

Week 8

- Text Readings: Field extensions, splitting fields, separable polynomials:

Jacobson I: 4.1,4.3,4.4 - Week 8 Problem set 8 (Due 3/30/17)

Week 9

- Text Readings: Separable polynomials and Galois Theory: Jacobson I: 4.4,4.5
- Week 9 Problem set 9 (Due 4/6/17)

Week 10

- Text Readings: Galois Theory and Theory of Fields: Jacobson I: 4.5,4.6
- Week 10 Problem set 10 (Due 4/13/17)
- Week 10 expository reading:

Week 11

- Text Readings: Solvable groups and Solvability by Radicals: Jacobson I: 4.6,4.7
- Week 11 Problem set 11 (Due 4/20/17)

Week 12

- Text Readings: Galois groups of polynomials : Jacobson I: 4.8-4.10,4.13
- Week 12 Problem set 12 (Due 4/27/17)

Week 13

- Text Readings: Applications of finite fields; Central Simple Algebras: Jacobson I:4.16, Jacobson II:4.6, 4.7
- No further weekly problem sets (beyond the previous 12) will be assigned. In lieu of an in-class final exam there will be a take final problem set