JHR's MA275 page
MTRF 9 G221
Discrete and Combinatorial Algebra
Associate Professor of Mathematics
Office: G-215A, Crapo Hall
Phone: (812) 877-8473
Office hours week: MTRF 7, or make an appointment, or drop in.
The final exam takes Tuesday, November 17 8:00AM-noon in O203..
Homework for our next class
For Friday, September 4: Section 1.2 #1,7,11,14,15,17,26,31,39.
Turn in these exercises on Monday.
For Monday, September 7: Section 1.3 #1,6,9,14,16,17,23,27,32.
For Tuesday, September 8:
Section 1.4 #1,7,10,16,22,25,27. Turn in these exercises on Thursday.
For Thursday, September 10:
Turn in the Section 1.4 exercises.
Section 1.5 #1,4,7,9,11.
For Friday September 11:
We will have a quiz covering Chapter 1 material.
Section 2.1 #3,5,6,8,17. Turn in these exercises.
For Monday, September 14:
Turn in the Section 2.1 exercises.
Section 2.2 #1,6,9,14,15.
For Tuesday, September 15:
Section 2.2 #2,5,18. Turn in these exercises on Thursday.
For Thursday, September 17:
Turn in Sec 2.2 #2,5,18.
Section 2.3 #5,7,11,12.
For Friday, September 18:
Section 2.4 #1,9,14,21.
For Monday, September 21:
Section 2.5 #5,9,14,15,19,21. Turn in these exercises on Tuesday.
For Tuesday, September 22:
Turn in the Section 2.5 exercises.
Section 3.1 #1,5,8,10,23,27; Section 3.2 #1,5.
For Thursday, September 24:
Section 3.2 #3,6,16,19.
Friday, September 25:
Exam #1. The average score was 653/900.
Equivalent grades are A 800-890, B 690-799, C 570-689, D 440-569, F <440.
For Monday, September 28:
Section 3.3 #1,4,5,6,9.
For Tuesday, September 29:
Section 3.4 #1,5,6,9,11,14. Turn in these exercises on Thursday.
For Thursday, October 1:
Turn in the Section 3.4 exercises.
Section 3.5 #1,4,7,9,14.
For Friday, October 2:
Supplementary problems pages 189-191 #2,5,16,40. Turn in these exercises on Monday.
For Monday, October 5:
Turn in the supplementary exercises from pp189-191.
Work the exercises Sec 4.1 #1,2,6.
For Tuesday, October 6:
Work exercsies Section 4.1 #8,12,16.
For Monday, October 12:
Work exercises Section 4.2 #1,7,11,12,14,18.
For Tuesday, October 13:
Work exercises Section 4.3 #1,2,4.
For Thursday, October 15:
Work exercises Section 4.3 #9,10,13,17,29.
Friday, October 16:
The average score on Exam #2 was 735/1000.
Equivalent grades are A 810-925 B 710-809 C 610-709 D 510-609 F <510.
For Tuesday, October 20:
Work exercises Section 4.4 #1,4,6,12,14,17.
We will turn in the exercises on Friday.
Find small integers (a,b) so that the Euclidean Algorithm take at least ten steps.
For Friday, October 23:
Turn in the Section 4.4 exercises.
We will have a Quiz regarding the Euclidean Algorithm.
Section 4.5 #5,11,15.
For Monday, October 26:
Section 4.5 #8,18,22,27.
For Tuesday, October 27:
Do the worksheet divisibility exercises.
For Thursday, October 29:
Prove that (x-y) divides (xn - yn);
Section 5.1 #1,3,6,8,13. Turn in these six exercises on Friday.
For Friday, October 30:
Turn in Thursday's homework.
Work exercises Section 5.2 #1,5,8,14,22,27.
For Monday, November 2:
Work exercises Section 5.3 #1,3,10,15,18.
For Tuesday, November 3:
Work exercises Section 5.5 #2,9,11,14,16,20.
Friday, November 6:
The average score on Exam #3 was 688. Equivalent grades are A 825-935 B 700-824 C 575-699 D 450-574 F <450
For Tuesday, November 10:
Section 5.6 #1,3,12.
For Thursday, November 12:
Bring your computer to class. Work exercises Section 5.6 #9,14,17,22.
For Friday, November 13:
Look at the supplementary exercsies at the ends of chapters 1,2,3,4,5.
To the top
Questions from class
To today's questions
In the "Questions" section, I'll color the active questions
green so that they are easier (in theory) to find as you scan through the page.
let me know
if I've missed anything.
Homework is due at the beginning of class on the day that it is due.
You should turn in your homework in a pile on the desk at the front of the classroom.
Homework may be turned in later but will be penalized based on just how late it is - typically
1 point off for turned in late during the class,
5% off for being turned in late the same day,
10% off per day. (weekends count for two days)
i.e. 10 days later, it's too late to get a makeup homework turned in.
When writing up homework, you should circle (or otherwise clearly indicate) your answers.
It's good to work together, but you should write/type your own homework.
Simply copying another person's work or Maple file will result in a 0 and a letter to the Dean of Students.
You should come to class prepared. This means that I expect you to have done the homework, brought your book to class, and silenced your cell phone.
If you have a cell phone, please make sure that it does not ring audibly during class. Phone calls should, in general, not be answered during class.
No texting during class.
- If you don't understand something, ASK
- If I'm going too fast, STOP ME.
I enjoy mathematics. When I get on a roll, I tend to keep going.
- SHOW YOUR WORK. The correct answer will only be worth 1 point. I want to verify that you understand the process.
- If you are having problems understanding the material, see me or go to the learning center.
The final exam is 36% of the course grade. Homework, quizzes and exams constitute the other 64%.