Math 221 - Spring 1998 - 10:30 Section (Jaffe)

`http://www.math.unl.edu/~djaffe/221`

Math 221 - Spring 1998 - 10:30 Section (Jaffe)

The Department's page for this course is here.

Instructor: David Jaffe; my homepage is here; my phone is 472-7253 (office) and 467-5518 (home); my email address is jaffe@cpthree.unl.edu.

Class: 10:30-11:20 MWF (Bessey Hall 104)

Office Hours: 2-3 MWF, 936 Oldfather Hall, but please feel free to drop by at other times or call in advance to make sure I am there. Generally, before 12:30 on MWF is not a good time to come by, unless you have a short question.

Text: Differential Equations, preliminary edition, by Blanchard, Devaney, and Hall (Brooks/Cole Publ. Co., 1996) (Listed as BDH below.)

Printed syllabus: This gives a rough outline of the course. Do not rely on it for specific details of assignments, which will be posted here (and announced in class).

Class attendance: is required. If you are absent, check this page to see what the assignment is, and see me (or your fellow students) to determine what was covered.

Computer lab orientation: Go immediately to Bessey 105 and sign up for an orientation session (or two, depending on your background).

Exams: There are three hour exams, which will be on February 4, March 2, and April 15. The final exam is 10-12 noon, Tuesday May 5. You may use calculators (but not computers) on exams.

Grade: Non-exam activities (such as homework and quizzes) account in total for about 150 points. (If the total differs from 150, it will be scaled accordingly.) There three hour exams account in total for 300 points. The final exam accounts for 200 points. All of the exams are scaled to determine their point contribution. (On each exam the number of points you got will be written on the front page.) Thus in total there are 650 points. Grades will then be assigned according to the standard scale (90% = A, etc.).

Homework: will be regularly assigned. Some will be collected and some will not, but you should do it all. Some homework will require the use of the Computer Lab (or the equivalent). On all homework, you may discuss problems with your classmates or anyone else, but you are to write up your own solutions, independently. For problems which request an explanation, answer with complete, grammatically correct sentences.

Really cool stuff: Find solution curves for a system dx/dt = f(x,y) and dy/dt = g(x,y) and show the phase portrait, here. It is a Java applet, and consequently not accessible from our machines. But any computer running Netscape will be able to access it.

Table of assignments

week	day	read for next class	problems (do for next class)	hand in	other
1 (Jan. 12)	1	BDH 1.1	2, 3, 4, 8, 9, 10, 12, 13, 20	.	erratum
1 (Jan. 14)	2	BDH 1.2	1, 2, 4c, 6, 10, 16, 18, 25, 31, 35, 37	.	.
1 (Jan. 16)	3	BDH 1.3, Maple examples handout, which was passed out in class, but this is the corrected/revised version.	3, 5, 7, 9, 11, 12, 14, 15, 17	.	There will be a quiz Wednesday over 1.1 - 1.3.
2 (Jan. 19)	1	Prepare for quiz, next class.	.	.	Quiz today!
2 (Jan. 21)	2	BDH 1.4	4, 6, 13	.	Use euler3.ms (for Release 3), euler4.ms (for Release 4). Also note that exercise 11 is nonsense.
2 (Jan. 23)	3	BDH 1.5	3, 7, 9, 13, 15, 18	.	Start assignment 1.
3 (Jan. 26)	1	BDH 1.6	1, 5, 9, 13, 16, 21, 23, 25, 29, 33	.	There will be a quiz Wednesday over 1.4 - 1.6
3 (Jan. 28)	2	BDH 1.8	2, 3, 6, 9, 11, 15, 27	.	Quiz today!
3 (Jan.30)	3	.	.	.	Review for exam
4 (Feb. 2)	1	.	.	.	Review for exam. Come to my office Tuesday between 9am and 2pm if you have questions.
4 (Feb. 4)	2	BDH 2.1	.	.	Exam today! Finish up assignment 1.
4 (Feb. 6)	3	BDH 2.2	2.1 #7, 9, 10; 2.2 #1, 7, 9, 13, 17, 19	.	.
5 (Feb. 9)	1	BDH 2.3	.	.	.
5 (Feb. 11)	2	BDH 2.4	2.3 #2, 5, 9, 13, 29, 30, 31; 2.4 #1, 3.	Assignment 1	Here is an example of how to use Maple to get graphical information about a two-dimensional system. You'll need this to do the homework problems. Prepare for quiz.
5 (Feb. 13)	3	.	2.4 #5, 6, 7, 9, 10	.	Quiz today! Here is Assignment 2. Problem 15 does not make sense.
6 (Feb. 16)	1	BDH 2.5	.	.	.
6 (Feb. 18)	2	.	2.5 #3, 5, 7	.	.
6 (Feb. 20)	3	BDH 2.6	2.6 #3, 5, 7; complex numbers exercises (handwritten handout)	.	.
7 (Feb. 23)	1	BDH 3.1	2.6 #11, matrix exercises (handwritten handout)	.	Finish up assignment 2.
7 (Feb. 25)	2	BDH 3.2	3.1 #3, 5, 7, 9, 13, 16, 17, 19	.	I distributed solutions to complex numbers handout.
7 (Feb. 27)	3	.	3.1 #25, 27, 31, 33; 3.2 #3, 5, 7, 11a, 15a, 29, 30, 31	.	.
8 (Mar. 2)	1	.	.	.	Things you need to know for exam 2.
8 (Mar. 4)	2	Review problem sheet (handed out in class).	.	.	Extra office hours: Thursday, 9am to 3pm.
8 (Mar. 6)	3	.	.	.	Exam today!
9 (Mar. 9)	1	BDH 3.3, 3.4	3.3 #1, 3	.	.
9 (Mar. 11)	2	.	3.4 #1, 3, 5, 9, 15, 17	.	.
9 (Mar. 13)	3	BDH 3.5	sheet labelled "More review problems" and 3.4 #20, 22	.	.
10 (Mar. 16)	1	.	3.5 #1, 3, 9, 10, 18, 21	.	Exam retake tonight, 7 - 9pm, room TBA.
10 (Mar. 18)	2	Supp. Notes, Sections 1, 2	S1 #1,2,3; S2 #1,2	.	.
10 (Mar. 20)	3	Supp. Notes, Section 3	S2 #4; S3 #1-11	.	.
11 (Mar. 30)	1	Supp. Notes, Section 6	S6 #1, 5, 6, 7, 8, 9, 10, 11	.	.
11 (April 1)	2	BDH 8.1	.	.	Quiz over Chapter 3 and Sections 1-3 of Supp. Notes
11 (April 3)	3	.	8.1 #1ab, 9, 13, 16	.	.
12 (April 6)	1	.	.	.	Quiz over Section 6 of Supp. Notes
12 (April 8)	2	.	8.1 #3, 5, 6, 7, 15	.	.
12 (April 10)	3	.	.	.	.
13 (April 13)	1	BDH 8.2, 8.3	8.2 #2, 11, 15, 17	.	.
13 (April 15)	2	.	8.3 #2, 6, 8, 9ab	.	Quiz over 8.1
13 (April 17)	3	.	.	.	Extra credit project assigned.
14 (April 20)	1	.	.	.	A handout on partial fractions will be available by 4pm today. Extra office hours: Tuesday 12 - 4:30.
14 (April 22)	2	.	.	.	Exam today!