# JHR's MA375 page

## MA375 Discrete and Combinatorial Algebra II

MTRF 6 G310
John Rickert, Associate Professor of Mathematics
Office: G-215A, Crapo Hall
Phone: (812) 877-8473

e-mail: rickert@rose-hulman.edu

Here's my Schedule

To Homework ...Questions
Homework for our next class ...Today's questions
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The Final exam takes place Tuesday, May 27,2014 8:00AM-noon in G310.

For Tuesday, March 11: Section 6.1 #8,12,15,24,25.
For Thursday, March 13: Turn in the Section 6.1 homework exercises.
Work exercises Sec 6.2 #1,3. Turn in these exercises on Friday.
For Friday, March 14: Turn in the Section 6.2 homework exercises.
Work exercises Section 6.3 #1,4,5, and construct a finite state machine to add two non-negative binary integers. Turn in these exercises on Monday.

For Monday, March 17: Turn in the Section 6.3 homework exercises and your finite state machine to add to non-negative binary numbers.
On pages 334-5 exercises #3,6,9.
We will start class with a Finite State Machine quiz.
For Tuesday, March 18: Section 7.1 #1,5,6,15.
' For Thursday, March 20: Review binary relations and state machines. Make sure you understand the definitions of equivalence relation and partial order.
For Friday, March 21: Section 7.2 #1,2,16,18,21,24. Turn in these exercises on Monday.

For Monday, March 24: Turn in the Section 7.2 homework exercises.
Work exercises Section 7.3 #1,13,20,25,27.
For Tuesday, March 25: Section 7.4 #1,6,9,13,14,17. Turn in these exercises on Thursday.
For Thursday, March 27: Turn in the Section 7.4 exercises.
Section 7.5 #1,3.
For Friday, March 28: Look at review exercises: Chapter 6 pp334-336; Chapter 7 pp 378-381.
After reviewing for the exam we will continue with Section 14.3, The Integers Modular n.

For Monday, March 31: The averaage on Exam #1 was 662. Equivalent grades are A 870-980 B 750-869 C 626-749 D 500=624 F <500
For Thursday, April 3: Section 14.3 #1,2,6,17,18. Turn in these exercises on Monday.
Friday, April 4: No class. I will be at the Indiana MAA meeting.

For Monday, April : Turn in the Section 14.3 homework assigned Thursday (#1,2,6,17,18).
Work exercises Sec. 14.3 #23,26,28,31,32.
For Tuesday, April 8: Section 8.1 #5,6,13,23,26,29.
For Thursday, April 10: Turn in the RSA homework.
Section 8.2 #2,4,8.
For Friday, April 11: Section 8.3 #1,5,6,11. Turn in these exercises on Monday
For Monday, April 14: Turn in the Section 8.3 exercsies.
Page 410 #3,4.
For Tuesday, April 15: Page 411 #10,12. Turn in these exercises on Thursday.
For Thursday, April 17: Turn in the page 411 exercises.
Section 9.1 #1,2,4.
Friday, April 18: The average score on Exam #2 was 823. Equivalent scores are A 900-1000, B 800-899, C 700-799, D 600-699, F <600.

To think about over break (and beyond): What are the next five terms in the sequence 1,1,2,3,5,8,13,21,34,55,91,149,245,505,666,1097,...? Why?
How many factors of 2 are there in the binomial coefficient (128768072 choose 64384036)?

For Monday, April 28: Section 9.2 #1,3,5,9.
For Tuesday, April 29: Section 9.2 #13,18,24,27,30. Turn in these exerciss on Thursday.
For Thursday, May 1: Turn in exercises Section 9.2 #13,18,24,27,30.
Section 9.3 #1,6.
For Friday, May 2: We will have a quiz covering parts of Sections 9.1-9.3. The average score on the quiz was 29.4/40. Equivalent grades are A 36-40 B 32-35 C 28-31 D 24-27 F <24.
Section 9.3 #7,9.
For Monday, May 5: Section 9.4 #1,3. Turn in these exercises on Thursday.
For Tuesay, May 6: Section 9.4 #6,9.Turn in these exercises on Thursday.

For Thursday, May 8: Turn in the Section 9.4 exercises.
Section 9.5 #1,3,7,8.
For Friday, May 9: Section 10.1 #1,3,6,8,9.

For Monday, May 12: Section 10.2 #1,4,7,8,11,23.
For Tuesday, May 13: Section 10.2 #12,20,25,30,33. Turn in these exercises on Tuesday, May 20.
For Thursday, May 15: Section 10.3 #1,4,6,8,14.
Friday, May 16: Exam #3
For Monday, May 19: Section 10.4 #1.
Tuesday, May 20: Turn in The Section 10.2 exercises #12,20,25,30,33.

As we review for the final exam you may wish to look at some sample Review exercises:
pp 334-335 #3,6,9; pp 378-380 #1,2,8,14,16; page 709 #3,14; pp 413-414 #1,2,7,9,10,15,17; pp 445-446 #1,5,6,9,13,18; pp 508-509 #2,4,5,6,8,17.

Answers should be explained. The correct answer will be worth 1 point. The rest of the credit comes from correctly explaining how the answer is found.
The final exam will be given during finals week. If you are making arrangements for travel home, you should make sure that they will not conflict with the final exam schedule. If your parents will be purchasing airline tickets for you, you should contact them and remind them not to schedule you on a flight that might cause you fail a class.
The weights for the grade are given below.
A stapler is probably a good investment for most of you. Multi-page homeworks should be stapled together, not mutilated.
Place your name and Campus Mailbox number in the upper right-hand corner of your homework. 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 is not acceptable.
The grader and I reserve the right to return as unacceptable any homework that is inadequately prepared. (full of scratch work, problems out of order, submitted on crumpled or fringed paper)
If you have any questions while I'm not around, you may e-mail me at john.rickert@rose-hulman.edu and I will reply as soon as I can.

You should come to class prepared. This means that I expect you to have done the homework, brought your book to class and be prepared with questions about material that you don't understand.
• 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 as soon as possible.

The in-class exams, homeworks andd quizzes are worth 64% of the course grade.
The final examination will be worth 36% of the grade.
There may be two types of quizzes -- announced and unannounced.

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