JHR's MA221 page
MA221
Differential Equations I
MTRF 5, G313
John Rickert,
Associate Professor of Mathematics
Office: G-215A, Crapo Hall
Phone: (812) 877-8473
Campus mail: CM 141
e-mail: john.rickert@rose-hulman.edu
Office hours: MTRF 7, or stop by and see if I'm in.
My schedule
policy
grade weights
Notes
Mathematics department MA221 syllabus
Homework
Today's homework (for tomorrow's class)
For Friday, August 31:
Section 1.1 #1,3,4,6,8,9,11.
Turn in these exercises on Monday.
For Monday, September 3:
Do exercises 1-6 of the Simple Complex Homework.
Turn in these exercises on Tuesday.
Tuesday, September 4:
Do the Matrix homework.
Turn in these exercises on Thursday.
Thursday, September 6:
Sec. 2.1 #4,6,8,12,18,22,31,35,38,39.
Friday, September 7:
Sec. 2.2 #1,4,5,12,13,16.
Monday, September 10:
Sec. 2.2 #19,23,27,32,34,39,41,42.
We will have a separable initial value problem quiz on Monday
Tuesday, September 11:
Sec. 2.2 #19,23,27,32,34,39,41,42.
Turn in these exercises on Monday, September 17.
Thursday, September 13:
Sec. 2.3 #3,7,8.
Friday, September 14:
Sec. 2.3 #11,14,15,19;
Sec. 2.4 #1,9
For Monday, September 17: Section 2.4 #3,13,15,20,23,28,32,33.
We will have a quiz about a falling object experiencing air resistance.
For Tuesday, September 18:
Work on the
linear differential equations worksheet.
For Thursday, September 20:
Section 2.5 #1,4,9,10,11,12.
Note that nothing needs to be turned in Thursday.
For Friday, September 21:
Work through the exercises of the past two days.
Read Section 2.6.
A corrected version of the exact differential equations example is now online.
For Monday, September 24:
Section 2.6 #5,11,13,17,20,24,29,34,37,41,50.
For Tuesday, September 25:
Section 2.6 #5,11,13,17,20,24,29,34,37,41,50.
For Thursday, September 27:
Read Sections 2.7 and 2.8.
Friday, September 28:
Exam #1
The average score was 90.2. Equivalent grades are
A 105-118, B 85-104, C 65-84, D 50-69, F <50.
Tuesday, October 2:
Section 2.7 #4,11,17,27;
Section 2.8 #5-8;
Section 2.9 #4,7-10,15,19,23,31.
Thursday, October 4:
Secttion 3.1 #6,10,16;
Section 3.2 #3,6;
Section 3.4 #13,20.
Turn in these exercises on Friday.
Friday, October 5:
Section 4.1 #1,6,7.
Turn in these exercises on Monday.
Turn in the Chapter 3 homework exercises.
Monday, October 8:
Section 4.1 #10,12,13,17,22;
Section 4.2 #3,9,13,15.
Turn in the homeowrk discussed Friday.
Tuesday, October 9:
Section 4.3 #1,3,6,9,11,14,34,38.
Turn in these exercises on Monday.
Thursday, October 12:
Think deeply about differential equations around you.
Monday, October 15:
Section 4.3 #17,19,22,29,31;
Section 4.4 #3,5,7,11,16,18,23.
Turn in the homework discussed Tuesday.
Tuesday, October 16:
Section 4.5 #1,7,10,14,19,25,27,33,41.
Turn in this homework on Friday.
Thursday, October 18:
Section 4.6 #1,7,10.
Friday, October 19: Section 4.7 #2,3,7,10.
Turn in Section 4.5 HW.
Monday, October 22:
Exam #2
Thursday, October 25:
Section 4.7 #13,18,22,29,33,37.
Where the book says "use a numerical dolver", use dsolve.
The Maple file from class is now available.
It is also on ANGEL, unde the Maple files folder in Lessons.
Try modifying the example so that omega is some number smaler than 50 (e.g. 10, 5, or 8) and see what that does to the solution.
Friday, October 26:
Section 6.1 #1,3,7,17,30.
Monday, October 29:
Section 7.1 #27,33,36,49,51,53;
Section 7.2 #5,9,13,17,21,31,36.
Turn in these exercises on Tuesday.
Use the Maple LinearAlgebra package to get commens to perform row operations and find reduced row echelon form.
Tuesday, October 30:
Section 7.3 #3,7,13,16,19,23,27.
Turn in these exercises on Thursday.
Turn in the Section 7.1-7.2 homework exercises.
Thursday, November 1:
Section 7.4 #1,7,11,17,19,23,26.
Turn in the Section 7.3 homework exercises.
Friday, November 2:
Section 7.5 #1,3,5,11,19,27,29,35.
Monday, November 5:
Exam #3.
Average was 79.1.
Equivalent grades are A: 95-111, B: 75-94, C: 55-74, D: 35-54.
Thursday, November 8:
Section 7.6 #3,7,21,33,34;
Section 7.7 #1,7,15,16,37,43,50,51,52.
Friday, November 9:
Section 9.1 #3,13,29,34,39,45,53;
Section 9.2 #1,7,59.
We will set aside some class time for filling out student evaluations.
Notes
Course Policy
Material added since the beginning of class will be in purple
This class will have three in-class exams - most likely during the 4th, 6th or 7th, and 9th weeks.
Note: I don't set grades using a 93/86/77/70 "straight scale" system. I plan to challenge you to excel. This means that the exam averages will generally be lower than what you are used to.
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.
There may be two types of quizzes given in class: announced and unannounced.
A stapler is probably a good investment for most of you. Multi-page homeworks should be stapled together, not mutilated.
Homework will typically be due at the beginning of class on the due date.
Homework may be turned in later but will be penalized based on just how late it is - typically 10% off per day. 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.
If the homework is on a worksheet that is passed out to the class, you will generally be expected to write your answers on a separate sheet of paper, in a well-organized fashion. Answers should be written on the worksheet only if answer blanks have been specifically provided.
If you have any questions while I'm not around, you may e-mail me at
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 launched Maple at the beginning of 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.
I will assign some `group' projects in this class.
Groups will consist of either three or four members. Write-ups from smaller or larger groups will not be accepted unless prior approval has been given.
Write-ups should be neatly presented. Write-ups returned on the information sheet handed out to the groups will not be accepted. Write-ups handed in at the end of class may be hand-written. Write-ups for work outside of class should be typed. Maple code may be included as part of an appendix or in figures, but should not be considered as a `formal' write-up. Similarly, `scratch-work' is unacceptable. Neatly written partial results may be turned in, but scribbles will reduce your grade.
A summary of the grade weights
There will be three in-class exams worth 15% each
The final exam will be worth 30%
Quizzes and homework will be worth 25%
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