# Math 330. Abstract Algebra

Spring 2024

• Instructor:         Enrique Treviño

• Lectures:           MWF 10:00 - 10:50 am in Brown Hall 121

• Office Hours:    Tuesdays and Thursdays between 9 am to 11:30 am. Also Mondays and Wednesdays from 4pm to 5pm. You can also arrange a meeting by appointment.

• Office:               Brown Hall 123

• Email:

• Phone Ext.:        #6187

Announcements

All the homework assignments and their solutions are here:
Homework

Course Description

A study of algebraic structures with emphasis on groups, rings, and fields. Prerequisite: Mathematics 230. (Under the old GEC, this course meets the Natural Science & Mathematics requirement.)
Textbook

Abstract Algebra: Theory and Applications by Tom Judson.

The textbook is an open-source book, you can download it free at the textbook's website. If you prefer a hardcover version of the book, the book can be ordered at the Lake Forest bookstore or it can be ordered online at Amazon or at Barnes and Noble for the inexpensive price of \$20.

The following books have been placed on reserve in the library for more references:
Abstract Algebra by Dummit and Foote and
A First course in Abstract Algebra by Fraleigh
Visual Group Theory by Nathan Carter. The library has an ebook copy of this book too.

Topics we will cover

We will cover basic group theory, i.e., groups, subgroups, cyclic groups, permutation groups, cosets, Lagrange's theorem, Euler's theorem, group actions and basic ring theory. If we have time we'll also cover Sylow's theorems.
Student Learning Outcomes

Main Goals:
• Understand what a group is.
• Be able to prove that something is a group.
• Understand what a subgroup is.
• Be able to prove that something is a subgroup.
• Understand and be able to prove Lagrange's Theorem
• Understand what it means for a group to be cyclic and how to prove that something is cyclic.
• Understand the permutation group Sn and be able to make calculations inside it
• Understand orders and how to calculate them.
• Ability to classify all abelian groups of small order.
• Understand what a ring is.

The course grade will be based on:
Homework 20%,
Midterms 45% (15% each),
Final Exam 35%.

Homework

LaTeX Resources

As described above, the homework assignments should be written in LaTeX (and compiled to a pdf).

• For each homework assignment, I provide my LaTeX code for the solutions to some of the problems. I suggest you use that code as your template. You should only turn in the problems I assigned to turn in, but you can use the exercise text I already provided and the same structure.
• Slides from a talk on LaTeX created by Vadim Ponomarenko of San Diego State University.
The TeX source code for the slides. (Right-click to Save Link As).
• LaTeX on Wikibooks. A very useful online manual.
• For PC users, you can use TeXnicCenter to compile. You'll need to install MiKTeX. After you install MikTeX, you wil also have TeXWorks in your computer. You can use this compiler instead of TeXnicCenter if you prefer. Or find your own.
• For Mac users the things to install are different. You can use MacTeX or find one of your liking online.
• Another option is to compile things online in Overleaf. Many of my students have liked how easy it was to use.
• Bates College has a very nice manual in their Math departmental website: The Bates LaTeX Manual.

Exams

There will be three midterms and one final exam. On the midterms and the final exam you must work on the problems on your own. No collaboration permitted in the exams.

The tentative dates are:

• The first midterm will be on Wednesday February 21 from 9:55am to 10:55am.
• The second midterm will be on Friday March 22 from 9:55am to 10:55am.
• The third midterm will be on Friday April 19 from 9:55am to 10:55am.
• The final exam will be on Saturday May 4 from 8:30am to 11:30am.

Attendance

Students are expected to come to every lecture and every exam.

If the dates of the exams conflict with Lake Forest approved events, inform me as soon as possible.

Description of instructional time and expectations:

This course meets 3 times per week for 3 hours per week. The course carries 1.0 course credit (equivalent to four semester credit hours). Students are expected to devote a minimum of 12 hours of total work per week (in-class time plus out-of-class work) to this course.