12/10/19: Given that I will be giving a Final in Math 8301 starting at
12:20 tomorrow, Wednesday, December 11, I have to move my office hours
to 11:15-12:05. Basically, see me after the class if you would like to
talk to me.
12/10/19: Given that I will be giving a Final in Math 8301 starting at
12:20 tomorrow, Wednesday, December 11, I have to move my office hours
to 11:15-12:05. Basically, see me after the class if you would like to
talk to me.
12/9/19: Extra office hours tomorrow, Tuesday, December 10, 1:25-2:15
p.m.
12/9/19: Extra office hours today 12:20-1:15 p.m.
12/9/19: Further reduction of reading part of the last homework: You
may safely skip A3.5 and A3.6. Now the reading assignment from
Apeendix 3 is: A3.2 (through Proposition A3.1), and A3.3-A3.4 and
Exercise A3.10 (read the statement).
12/8/19: Taking into account the last-week pressure on all of us, I
have reduced the reading assignment from Appendix 3 on HW7 to A3.2
(through Proposition A3.1), and A3.3-A3.6 and Exercise A3.10 (read the
statement).
12/6/19: I have posted the argument that I missed in class in the
proof of Lemma A3.8 (creating injective R-modules from injective
S-modules by HomS (R, --)) on
our Homework page.
12/4/19: As noticed by Mathieu, the problems that I though I had
included in Homework 7 were not there. I have put those three problems
back. Sorry!
12/3/19, 1:09 a.m.: Homework 7 is posted. This one is heavier on the
reading assignment rather than problems.
11/26/19: Because of the Snow Day, Homework 6 due date moves to
Monday, December 2. Have a great Snow Day and Thanksgiving!
11/22/19: Again, I have removed some other part of the reading
assignment from HW 6, but added something from Section 7.5, to reflect
better what we have been doing in class. These changes do not affect
the homework problems.
11/21/19: I have removed Section 7.6 from the reading assignment of HW
6, as we will not be able to get there before Monday.
11/19/19: I have discovered that I erroneously forgot to include a few
sections in the reading assignment of HW 6, due before Thanksgiving. I
have added them to the homework.
11/18/19: I have changed the wording of Exercise G Homework 6 to be:
prove that the direct limit functor on the category of R-modules is
exact. I have also replaced reading Appendix 6 in Eisenbud to reading
relevant sections of Atiyah-MacDonald.
11/15/19: Homework 6 is posted.
11/13/19: I need to move my Thursday office hours this week up
one hour. My office hours currently stand at: M 3:35-4:25, W
12:20-1:10, Th: 2:30-3:20. However, this week they are: M 3:35-4:25, W
12:20-1:10, Th: 1:30-2:20. You are always welcome to make an
appointment, though.
11/11/19: Mathieu has found an error in the textbook in Exercise 5.1
on Homework 5. To correct it, add "provided in(f) and in(g) have the
same degree" to the wording of Exercise 5.1.
11/4/19: I need to reschedule my Thursday office hours this week to
Friday, 12:20-1:10 p.m., just for this week. Thus, my office hours
currently stand at: M 3:35-4:25, W 12:20-1:10, Th: 2:30-3:20. However,
this week they are: M 3:35-4:25, W 12:20-1:10, F: 12:20-1:10. You are
always welcome to make an appointment, though.
11/4/19, 1:45 am: Homework 5 is posted.
10/30/19: I have clarified the wording of HW Problem F just a bit.
10/29/19, 1 a.m.: I am moving my Tuesday office hours to Thursday,
2:30-3:20 p.m. for the rest of the term. I believe it will better
suite the needs, as nobody has been showing up at my office hours on
Tuesday. Thus, my office hours currently stand at: M 3:35-4:25, W
12:20-1:10, Th: 2:30-3:20. Sorry for the late notice.
10/22/19: I have removed Section 3.6 from the reading part of Homework
4.
10/22/19: Homework 4 is posted on the class web page.
10/14/19: Given that we are following the classical text of Atiyah and
Macdonald now (in regards to primary decomposition), I have had one
copy of the textbook put on reserve in the Math Library. We will not
dwell on it for a long time, so there is no need to purchase a
copy. Moreover, a Google search reveals at least one free pdf copy.
10/9/19: From now on, homework due day will be Friday, including HW 3
due now on October 18, except for the pre-Thanksgiving HW, due on
Wednesday before Thanksgiving, and the last-week HW, due on the last
day of classes, Wednesday, December 11.
10/6/19: Homework 3 is posted on the class web page.
10/1/19: I will be holding office hours today from 12:05 to 1:25
p.m. These Tuesday office hours will replace my Thursday office hours
this week and for the rest of the semester. Sorry about a short
notice.
9/23/19: I have to reschedule my today's office hours, which are
normally 3:35-4:25, to 12:20-1:10 p.m. If you wanted to see me tonight
and cannot see me within the rescheduled time, please make an
appointment.
9/21/19, 6 p.m.: I owe you an apology once again: with all the
distractions of the day, I have been able to finish creating the
homework only now.
9/21/19, 2 p.m.: Folks, I apologize: I have not gotten to be working
on the new homework today until now. Give me an hour or two.
9/20/19: I have come across a correction list to Eisenbud's textbook:
https://www.msri.org/~de/corr2-3.pdf and am posting the link prominently on our class web page.
9/12/19: On a popular demand, given that you will not have complete
two weeks of classes before Monday, September 16, I am putting off
the due date for Homework 1 to the following Wednesday, September
18.
9/11/19: I need to move my Thursday, 09/12/2019, office hours this
week to Friday, 09/13/2019, 11:15-12:05. If you wanted to see me at
my office hours on Thursday, but cannot see me on Friday, make an
appointment to see me some other time.
9/6/19: Homework 1 is posted on the class web page!
9/4/19: I recommend the following way to study for this class. Attend
each class, take notes, participate in class actively. After each
class review your notes and study the corresponding part of the
text. You can find out which part of the text at the Class Outlines
page. Then do the assigned homework problems pertinent to that
material. I also encourage you to work in study groups on the
homework.
1
9/4/19: If you need to register for this course, please, send a
message to Stephanie Lawson at ugrad@math.umn.edu and ask for a permission number. If
permission is granted, go to OneStop and register.
Last modified: (2020-02-04 23:14:49 CST)