General Information:
Meeting Time:  MWF 11  11:50 
Location:  Morton 37

Instructor:  Ryan Vinroot
Office: Jones 100D
Office Hours: Mon 3:305, Wed 34, Thurs 1011 and 45 (also by appointment).

Textbook:  Abstract Algebra (Third Edition) by
David S. Dummit and Richard M. Foote 
Grade Breakdown:  Class Participation  5%, Midterm  30%, Homework  35%, Final Exam  30%. The
grading scale will be the standard 10 percentage point scale, so that a final
score of 93 or higher is an A, 9092 is an A, 8789 is a B+, 8386 is a
B, 8082 is a B, 7779 is a C+, 7376 is a C, 7072 is a C, etc. 
Attendance & Lecture Policy:  It is expected that you attend all
lectures, with exceptions minimized. It is greatly appreciated when you
are on time. Please do your best to stay awake and attentive during
lecture, please do not email or text during lecture, and keep all cell
phones/hand held devices/tablets/laptops put away during lecture (unless
you are specifically writing notes on a tablet). While it is
understandable that you may miss a lecture here and there, or be sleepy in
class once in awhile, repeated absences, late arrivals, naps, or general
nonattentiveness will negatively affect your class participation score.

Prerequisite:  Math 307  Abstract Algebra I. In particular, it
is expected that you are able to write clear proofs with techniques you
have learned in Math 307 and Math 214. 

Course Summary:
We will begin the course by continuing the group theory you saw in Abstract Algebra I. In
particular, we will first cover the Isomorphism theorems for groups (where the
first isomorphism theorem serves as a review of much of the group theory you
saw in Math 307). We will then cover a few more topics on group theory from
Chapters 3 and 4 of the text, including composition series and the Sylow theorems.
We will then move on to ring theory, and plan to cover material from Chapters
7, 8, and 9 from the text (where some topics from 307 will be quickly
reviewed). Finally, we will finish the course with a study of field extensions
in Chapter 13 of the book.
Dates & Course Announcements:
Midterm and Final Exams:
There will be one midterm. The final exam
will be timed. The midterm and the final will each count as 30% of your final
grade. The final exam will be on Wed, May 1, from 9 AM until 12 Noon.
Exam Calendar (Tentative):
Exam 
Date 
Time/Due 
Location

Midterm 
Due Mon, Mar 25 
In class 
Takehome

Final Exam 
Wed, May 1 
9 AM  12 Noon 
Morton 37

 All relevant announcements will be listed here. Check back frequently (don't forget
to refresh your browser) for updates.
 Important Dates and Class Holidays:
 Mon, Jan 21: NO CLASS (Martin Luther King Holiday)
 Mon, Jan 28: ADD/DROP DEADLINE
 Sat, Mar 2  Sun, Mar 10: NO CLASS (Spring Break)
 Fri, Mar 15: WITHDRAW DEADLINE
 Wed, May 1, 9:00 AM  12 Noon  FINAL EXAM
 (1/16) I will determine regular office hours after the add/drop period.
For this short week, my office hours will be: Wed, Jan 16 (today) 34 pm,
and Thurs, Jan 17, 1011 am and 23 pm.
 (1/23) My office hours this week will be as follows: Wed, Jan 23 2:304
and Thurs, Jan 24 9:3011 and 23.
 (1/28) HW #1 is due today at the beginning of class, either as a hard copy
handed in to me, or a pdf of a LaTex document emailed to me. HW #2 has been
posted and is due next Monday. My office hours this week will be: Mon Jan 28 45, Wed Jan 30 2:304, Thurs Jan 31 9:3011 and 23.
 (1/30) Here are some notes on the material
on group actions we covered in class. A more expanded version would be in
Sections 4.14.3 of the textbook, although this also contains several results
you saw in Math 307 (such as Cayley's Theorem and Lagrange's Theorem) which
use the notion of group actions.
 (2/4) My regular weekly office hours for the semester will be as follows:
Mon 3:305, Wed 34, Thurs 1011 and 45.
 (2/8) I fixed a typo on the assigned HW #3 due on Monday. I meant for #32
to be assigned, not #31. That has been fixed below.
 (2/14) Before Spring Break (which is already in two weeks and 1 day),
the group HW proving the properties of the Lattice Isomorphism Theorem will
be due. Just one HW needs to be turned in per group, with everyone's name on
that HW. This is due by class on Friday, March 1.
 (3/11) There will be one more HW due before you have the takehome
midterm. HW 6 will be due on Mon, Mar 18, and on that day in class I will
hand out the takehome midterm.
 (3/11) I am handing back the group homeworks with comments on them. I
have made copies so that each person in each group has a copy. A second
draft of the group HW will be due on Friday, Apr 12. Each group needs to
turn in a second draft in order to receive a score on the homework.
 (3/29) I very slightly shortened the HW due on Mon, Apr 1. For Problem 5
on pg. 293, you only need to do parts (a) and (b). I realized part (c) uses
a result that we haven't proved (and won't need otherwise) that any
nonmaximal ideal of a commutative ring is contained in some maximal ideal
(which can be proved using Zorn's Lemma).
 (4/22) My afternoon office hours have to shift to 30 minutes earlier
today, so they will be 34:30 today.
 (4/24) The Final Exam will be in our regular lecture room, Morton 37, on
next Wed, May 1, 9 AM12 Noon.
 (4/26) My office hours on the two days before the Final Exam are as
follows:
Mon, Apr 29  9:3011, 122, and 34:30
Tues, Apr 30  9:3011, 122, and 3:305.
Homework:
Homework problems will be a very important
part of the course, and there will be homework assigned almost every week.
Proofs and computations should be written
carefully and neatly, with attention paid to the completeness of your argument
and clarity of your steps. Individual homework
assignments should be written up by yourself, although some collaboration while
working on the homework is fine, and encouraged as long as the work you turn in
is your own formulation of a solution. You should not, under any
circumstances, attempt to copy solutions to problems online
(although I know this is very tempting), as this will have to be treated as plagiarism. Instead, email me for a hint, or
discuss problems in a group of classmates. There will
be homework problems which will be turned in and graded, and other homework
problems which will be suggested, but not to turn in.
Homework is due at the beginning of
class on the due date of the assignment, and if you like you may email me a pdf
of your homework (only) if you LaTex it (which is not required but welcomed). Homework that is turned in or in my email
inbox 10 minutes after the beginning of the class is considered late.
Everyone will get one free pass for a oneday late HW without penalty (by 5 pm
the day after it is due). Late penalties are:
10% off if it is turned in after the beginning of class,
but it is in my hands (on my door), or in my email inbox as a pdf by 5 pm on the day it is
due.
20% off if it is turned in by 5 pm the next weekday after the due date.
20% more off for each (week)day late, turned in by 5 pm, thereafter.
Everything
is easier, of course, if you turn in the homework on time!
Homework scores will each be out of 50 points. Your lowest homework score of
the semester will
be dropped.
Assignment 
Problems 
Due Date 
1  Turn in: pg. 101 #3, 4, 7, 8
Don't turn in: pg. 101 #2, 9, 10

Mon, Jan 28 
2  Turn in: pg. 106 #7, pg. 116 #1, 2, pg. 122 #8
Don't turn in: pg. 106 #2, pg. 117 #10, pg. 122 #14

Mon, Feb 4 
3  Turn in: pgs. 146147 #1, 13, 23, 30, 32
Don't turn in: pgs. 146147 #4, 14, 15, 21, 27

Mon, Feb 11 
4  Turn in: pg. 147 #17, 34, pg. 231 #7, 9
Don't turn in: pg. 147 #31, pg. 231 #8, 10, 11

Mon, Feb 18 
5  Turn in: pg. 238 #3(a), pgs. 247249 #2, 11, 16, 17
Don't turn in: pg. 238 #2, pgs. 248249 #7, 9, 25

Mon, Feb 25 
Group  Turn in: Prove all properties of the bijection in the
Lattice Isomorphism Theorem (Theorem 20, pg. 99)

Fri, Mar 1 
6  Turn in: pgs. 256257 #8, 11, pgs. 264 #3, pg. 267 #3, 4

Mon, Mar 18 
Midterm  Takehome Midterm due

Mon, Mar 25 
7  Turn in: Prove that
Z[√2] is a Euclidean
domain
pgs. 278279 #10, pg. 282 #3, pgs. 293 #5(a,b), 6(a,b)
Don't Turn in: pg. 278 #9, pg. 283 #7(a,b), pg. 293 #3, 4, 6(c)

Mon, Apr 1 
8  Turn in: pg. 306 #3, pg. 311312 #2, 3, 17, pg. 315
#3
Don't Turn in: pg. 306 #4, pgs. 311312 #1, 4, 18, pg. 315 #7

Mon, Apr 8 
Group  Second Draft of Group HW due

Fri, Apr 12 
9  Turn in: pg. 311 #6, 7, pg. 519 #4, 6, 7
Don't Turn in: pg. 311 #5, 8, pg. 519 #3, 5, 8

Mon, Apr 15 
10  Turn in: pg. 519 #1, pg. 530 #7, 12, 13, 14
Don't Turn in: pg. 519 #2, pg. 530 #4, 5, 10, 17

Mon, Apr 22 
Not due  Don't Turn in: pgs. 529530 #2, 3, 6, 16, pg. 545 #14

Last material for Final Exam 
Math Major Writing Requirement (Math 300):
If you are a math major, and you would like to complete your major writing
requirement through a writing assignment in this class, please let me know in
the first week of class. This writing assignment will not count towards your
grade in this class, but will rather just serve as your Major Writing
Requirement (Math 300). You should only do this if all of the following hold:
(1) you are not doing an honors thesis in Mathematics, (2) you are not doing
your COLL 400 requirement in Mathematics, and (3) you are a senior. If you decide to do this, you must write your paper on
a topic in Abstract Algebra (or a closely related subject) approved by me, and you must keep to a schedule of turning in
drafts we agree on at the beginning of the semester in order to get credit.
Student Accessibility
Services:
William & Mary accommodates students with disabilities in accordance with
federal laws and university policy. Any student who feels they may need an
accommodation based on the impact of a learning, psychiatric, physical, or
chronic health diagnosis should contact Student Accessibility Services staff
at 7572212512 or at sas@wm.edu to determine if accommodations are warranted
and to obtain an official letter of accommodation. For more information,
please visit the SAS webpage.
