Math 345 - Spring, 2018

There is no required text, but if you want a book I recommend Abstract Algebra by Thomas Judson. You can download it for free; be sure to get the latest edition. (I'm not following it or using itin any way.) Lecture notes are linked above, and homework will be posted here.

[03--25--218] During the makeup class on Saturday, March 24, I covered the material on normal subgroups and quotient groups that is in the 3 videos currently online. (The links are with the printed notes, linked above.) You should be sure to watch them and look at the printed notes if you were not at the class, since you are responsibile for the material.

Handouts

Renee Alshouse pointed out that in the cyclic subgroups programs above, you should start the loops at 0 rather than 1 if you want the identity element to be listed first. Otherwise, you'll get it when the list "closes up".

Mod Program for the TI 82/83/84

You can enter a short program to get a mod function if you have a TI 83 or 84.

Problem Sets

[04--29--2018] I will hand out paper copies of P.S. 29 in class; the work should be done on the handouts. A PDF file for the assignment is given below just in case. Note that no free makeups may be used on this last problem set (due Friday, May 4).

Problem Set Solutions

Solutions to the problem sets will be posted after the problem sets have been collected.

Review Sheets

Review Sheets help you study for tests; they're not graded work that you have to turn in. Just because there's a problem on the review sheet doesn't mean that there will be a similar problem on the test. And there may be problems on the test which are different from the review sheet problems. You're responsible for all the material we've covered.

[Wednesday, May 9] There was a typo in Problem 20 on the Review Sheet for the Final: "149!" should have been "148!". It's been corrected in the version linked below. Thanks to Renee Alshouse for pointing this out.

[Thursday, May 10] There was a typo in Problem 47 on the Review Sheet for the Final: The answer should be "3", not "4". It's been corrected in the version linked below. Thanks to Noelle Shellenberger for pointing this out.

Review Session Notes

I used to hold in-person review sessions (I stopped due to poor attendance). These are notes for the review sessions. If there's any question, refer to the review sheet for the test to see what you're responsible for.

The notes and the videos are not in sync with the material for a given test! (So there may be material on them you're not responsible for, and there may be material not included that you are responsible for.)

These are videos for the review sessions. (They're a little old.) You'll see me writing solutions to selected problems as I talk through the answers. I don't do all of the problems in the printed notes above. Most of the review sessions are in parts, so the videos don't get too long and the files don't get too big.

(Repeated for emphasis) The notes and the videos are not in sync with the material for a given test! (So there may be material on them you're not responsible for, and there may be material not included that you are responsible for.)


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