### Math 334 A1: Introduction to Differential Equations (Fall 2011)

#### Course Calendar

 Instructor / Office / Phone # Xinwei Yu / 527 CAB / (780)4925731 Email / Webpage xinwei.yu@gmail.com / http://www.math.ualberta.ca/~xinweiyu Location / Time / Office Hours DP 6069 / MWF 12pm - 12:50pm / M 1pm - 3pm; F 10:30am - 11:30am or by appointment

Exams Information

NEW! Laplace Transform Table (Will be provided in the final)

Know Where You Are After Two Midterms

Raw grades listing from High to Low; (Colored according to the percentage below: A, B, C, D&F; Only the 63 who took both midterms are listed here.)
UofA Suggested Percentage for 3rd Year Courses: A: 29%; B: 48%; C: 19%; D: 3%; F: 1%;
Note: The final grades may deviate slightly from the above suggestions due to overall performance of the whole class;
Note: A includes A+,A,A-, B includes B+,B,B-, etc.

Midterm 2 Statistics:

Total taking exam: 63; High: 97; Low: 23.

 Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Overall Average 26.77 16.12 9.29 12.19 13.92 0.19 78.49 Median 30 20 13 15 15 0 85 Standard Deviation 5.96 5.33 6.10 4.56 2.55 0.56 17.55

Midterm 1 Statistics:

Total taking exam: 67; High: 96; Low: 45.

 Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Overall Average 22 24 12 8.4 2.7 0.3 69.1 Median 25 25 13 8 2 0 69 Standard Deviation 5.4 1.9 2.6 4.5 3.3 0.6 10.8

Know where you are:

Raw grades listing from High to Low; (Colored according to the percentage below: A, B, C, D&F)
UofA Suggested Percentage for 3rd Year Courses: A: 29%; B: 48%; C: 19%; D: 3%; F: 1%;
Note: The final grades may deviate slightly from the above suggestions due to overall performance of the whole class;
Note: A includes A+,A,A-, B includes B+,B,B-, etc.

Course Information
Important dates
• Midterms (temporary): Friday Oct. 7, 2011; Wednesday Nov. 9, 2011. Both in class.
• Final: Thursday Dec. 15, 2011; 2pm-4pm;
• Deferred exam: 9AM Saturday, 14 January 2012 in CAB 528 (the old library).

#### Course Material

• Sections not required (Contantly Updating!): 2.3; 2.5; 2.7; 2.9; 3.7; 3.8; 4.4; 5.7; 7.9
• Practice problems from "Problems" at the end of each chapter.
 Chapter 2 (p.132) Basic: 1-32 except the following. Inter: 4, 13, 15,  20, Adv: 10, 31, Cha: 26-30, 32.

Week
Lecture Notes (Sections
in textbook)
Homeworks
(Solutions)

Practice Problems
1 (Sept. 7-9)
Homework 1
(Solution)
Quiz 1 Summary
• Basic: 1.3 1--20
2 (Sept. 12 - 16)
Homework 2
(Solution)
Quiz 2 Summary
 Basic 2.6: 1-12,15,19-22 2.1: 13-20 2.2: 1-8, Inter 2.6: 25-32 Adv 2.6: 17,23,24 2.1: 30, 31 2.2: 31-38 Cha 2.1: 32, 33
3 (Sept. 19 - 23)
Homework 3
(Solution)
Quiz 3 Summary
 Basic 2.8: 1,2, Inter 3.2: 1-6,19, Adv 2.4: 1-6, 23-31 3.2: 13-15,21,29-32 Cha 2.8: 13-19 2.4: 13-16,21,22 3.2: 7-12,16,33,36,38-40
4 (Sept. 26 - 30)
Homework 4
(Solution)
Quiz 4 Summary

 Basic 3.1: 1-16 3.3: 1-16 3.4: 1-14 Inter 3.1: 17, 18 3.3: 27, 29-31, 3.5: 1-18 Adv 3.1: 21-24 3.3: 28, 32 Cha 3.3: 33 3.4: 19
Note: "Sketch" part not required!
5 (Oct. 3 - 7)
Homework 5
(Solution)
Quiz 5 Summary
 Inter 3.6: 1-10, 13-20 Adv 3.4: 23-28, 31-37 3.6: 21-23, 28-32 4.1: 7-10, 17 4.2: 1-24, 29-36 (No graph) (Note change: 25-28 not required anymore!) Cha 4,1: 20, 25, 26-28
6 (Oct. 12 - 14)
Homework 6
(Solution)
7 (Oct. 17 - 21)
Homework 7
(Solution)
 Basic 5.1: 1-7, 9-17, 19-27 5.2: 1-14, 15-18( (a) only), 19, 20 Inter 5.1: 8, 18, 28

8 (Oct. 24 - 28)
Homework 8
(Solution)
 Basic 5.4: 1-34(No graphs); 41, 42 Inter 5.3: 1-9 5.4: 35 - 40 Adv 5.3: 10 - 14 5.5: 1 - 14 5.6: 1 - 12 Cha 5.3: 15, 27, 28 5.5: 15, 16 5.6: 18, 20, 21
9 (Oct. 31 - Nov. 4)

 Basic 6.1: 1-4 (Only Graph); 5 - 24 6.2: 1-23 6.3: 1-24 Inter 6.1: 26, 27 Adv 6.1: 25 6.2: 37, 38 6.3: 25, 34
10 (Nov. 7 - 9)
Homework 9
(Solution)

11 (Nov. 14 - 18)
Homework 10 (Solution)
 Basic 6.3: 1-18 Inter 6.3: 19-24 6.4: 1-13 6.5: 1-12 Adv 6.3: 25, 34 Cha 6.5: 16
12 (Nov. 21 - 25)
Homework 11 (Solution)
 Basic 7.1: 1-12, 15, 16 7.2: 1-9 Inter 6.6: 2-11, 13-20 7.2: 20-26 7.3: 16-25 Adv 6.6: 1, 12 7.1: 14 7.4: 5-9 Cha 7.4: 2-4
13 (Nov. 28 - Dec. 2)
Homework 12
(Will be posted Dec. 5)

(Solution)
(Will be posted Dec. 7)
 Inter 7.5: 1-6, 9-18 7.6: 1-10 7.8: 6 Adv 7.7: 1-10 (Just compute exp(At)) 7.8: 1-5, 7-10, 19-21. Cha 7.5: 19 - 23 7.7: 18 7.8: 15, 17, 18
Note: In all the above problems, "discussion ... as t->\infty" and "... plot ..." are not required.
14 (Dec. 5 - 7)

#### Useful Stuff

• Encyclopedic Differential Equation Website: Equation World.