Math 350 Introduction to Abstract Algebra

Semester: Fall 2017

Lecture 01 (11601)
Inst : Prof. Asher Auel
asher * auel AT yale * edu
Time : Mon Wed Fri 10:30 - 11:20 am
Loct : LOM 206
Office : LOM 210
Phone : (203) 432-4187
hours :
Tue 11:00 - 12:30 pm
Thu 01:30 - 03:00 pm
Text : Abstract Algebra, 3rd Edition
David S. Dummit and Richard M. Foote
John Wiley & Sons.
ISBN-13: 978-0-471-43334-7.
 Course syllabus and homework schedule.
Peer Tutor
Peer tutor : Jason Gaitonde
Office hours : Monday and Thursday 07:00 - 09:00 pm
Loct : Math Dept Common room
 Weekly updates
 Prof. Auel's office hours this week: Tuesday 11-12:30 and Wednesday 12:45 - 2:15 pm
 Jason's office hours this week: usual times

Description of course: Abstract Algebra is the study of mathematical structures carrying notions of "multiplication" and/or "addition." Though the rules governing these structures seem familiar from our previous middle and high school training in algebra, they can manifest themselves in a beautiful variety of different ways. The notion of a group, a structure carrying only multiplication, has its origins in the classical study of roots of polynomial equations and in the study of symmetries of geometrical objects like platonic solids. Today, group theory plays a role in almost all aspects of higher mathematics and has important applications in chemistry, computer science, materials science, physics, and in the modern theory of communications security.

The main topics covered will be (finite) group theory, homomorphisms and isomorphism theorems, subgroups and quotient groups, group actions, the Sylow theorems, ring theory, ideals and quotient rings, Euclidean domains, principle ideal domains, unique factorization domains, module theory, and vector space theory. Time permitting, we will investigate topics such as public key cryptography systems such as RSA. This will be a heavily proof-based course with homework requiring a significant investment of time and thought. The course is a must for all students planning to study higher mathematics, and would be helpful for those considering entering subjects such as computer science and theoretical physics.

Expected background: The official prerequisite is linear algebra, either Math 222 or 225, in in reality, all that is required is a mature mathematical mind, some experience with writing proofs, and the desire to work incredibly hard.

Homework 30%
Quizzes   10%
Midterm exam (16 Oct)   25%
Final exam (19 Dec) 35%
Grades: Your final grade will be based on weekly homework, a few quizzes, a midterm exam, and a final exam. Notice that more overall emphasis is placed on exams than on weekly homework assignments in computing your final grade. On the other hand, completing your weekly homework will be crucial to your success on the exams.
Group work, honestly: Working with other people on mathematics is highly encouraged and fun. You may work with anyone (e.g., other students in your section, in the course, not in the course, tutors, bums on the street, ...) on your homework problems. If done right, you'll learn the material better and more efficiently working in groups. The golden rule is:
Work with anyone on solving your homework problems,
but write up your final draft by yourself.
Writing up the final draft is as important a process as figuring out the problems on scratch paper with your friends, see the guidelines below. Mathematical writing is very idiosyncratic -- we will be able to tell if papers have been copied -- just don't do it! You will not learn by copying solutions from others or from the internet! Also, if you work with people on a particular assignment, you must list your collaborators on the top of the first page. This makes the process fun, transparent, and honest.


(or otherwise the small print)

Homework: Weekly homework will be due at the start of class on Friday. Each assignment will be posted on the syllabus page the week before it's due.

Late or improperly submitted homework will not be accepted. If you know in advance that you will be unable to submit your homework at the correct time and place, you must make special arrangements ahead of time. Under extraordinary circumstances, late homework may be accepted with a dean's excuse.

Your homework must be stapled, with your name clearly written on the top. Consider the pieces of paper you turn in as a final copy: written neatly and straight across the page, on clean paper, with nice margins and lots of space, and well organized.

No homework will be due during the week of the midterm exam.

Your lowest homework score from the semester will be dropped.

Exams/quizzes: The quizzes will be announced at least a week ahead of time. The midterm exam will take place in-class on Monday 16 October. The final exam will take place 02:00 pm - 05:30 pm on Tuesday 19 December 2017.

Make-up quizzes and exams will only be allowed with a dean's excuse.

The use of electronic devices of any kind during exams is strictly forbidden and would be pointless anyway.

Homework guidelines: Generally, a homework problem in any math course will consist of two parts: the creative part and the write-up.

  • The creative part: This is when you "solve" the problem. You stare at it, poke at it, and work on it until you understand what's being asked, and then try different ideas until you find something that works. This part is fun to do with your friends; you can do it on the back of a napkin. If you're having trouble, even in understanding what the problem's asking, use the resources available to you: my office hours, teaching assistants' office hours, weekly tutoring sessions, etc. Ask for help as early as you can! This part should all be done on "scratch paper."

  • The write-up: Now that everything about the problem is clear in your mind, you go off by yourself and write up a coherent, succinct, and nicely written solution on clean sheets of paper. Consider this your final draft, just as in any other course. This part you should definitely NOT do with your friends.