Math 217: Differential Equations, Spring 2008

                  

News This Week

  • Review Session is on Monday April 28 Busch 100.
  • Practice Exam Answer
  • Office Hour Before the Final Exam

 

Tang

Cupples I  Room 112B

Geir Hjelle

Cupples I Room 202

Xiao Huang

Cupples I Room 12

Wed, April 30

1:30 – 3:00 pm

3:00 – 5:00 pm

5:00 – 6:00 pm

Thu, May 1

2:00 – 4:00  pm

10:00 – 11:30 am

4:00 – 6:00 pm

Fri, May 2

  9:00 – 10:00 am

9:00 – 10:00 am

 
  • Suggested problem set  section 8.2 problem 5,17,25,31 section 8.3 problem 3,6,7,13,17,25

 

Old Exam Material

 

Class meeting & Instructors

  • Section01 MT-RF 10:00-11:00 AM Brown 118 Xiang Tang. Office:Cupples I room 112B, xtang@math.wustl.edu
  • Section02 MT-RF 12:00-01:00 PM Busch 100 Geir Arne Hjelle. Office: Cupples I room 202, hjelle@math.wustl.edu

Teaching Assistant

  • Xiao Huang, Office:Cupples I room 12, xhuang@math.wustl.edu

Text 

Review Session

  • There will be weekly review sessions in Busch 100 every Monday (starting from Jan 21st) evening 5:00-6:00p.m. and 6:00-7:00p.m. held by our TA. Review sessions are optional, but will be helpful to those with  questions about lectures and homework problems.

Office Hours 

 

Xiang Tang

M11-12, Th 2-3

Cupples I, 112 B

Geir Arne Hjelle

T 9-10, F 3-4

Cupples I, 202

Xiao Huang

Th 4-5:30, F 2-3:30

Brown 118


Course Webpage

  • http://www.math.wustl.edu/~xhuang/spring2008-diffeq.htm


Prerequisite

  • Math 233 (Calculus III), or Math 233 concurrently

Lectures

  • You are strongly suggested to attend the lectures. No talk, food and drinking is allowed in class. Please close your cell phone or change it to ``silent".  Information about materials covered and homework assigned each lecture will be updated on the course website.


Homework

·         You will have graded homework turned in every Tuesday at the beginning of Tuesday's lecture.  Late homework will not be accepted! The homework collected is to be considered a bare minimum of homework that you should do. "A" students will generally do nearly every problem in the exercise sections.

·         Put the following information at the top left corner of each page of your homework: full name, student ID, and the due dates. Your turned in homework will be graded on several factors including accuracy and neatness. It is your responsibility to make sure the grader can understand your work.

  • Homework is graded according to the following distribution. Total score of a homework  is 10. 4 out 10 is graded according to the amount of work being completed. And the left 6 out of 10 is graded according to the accuracy. We will choose to grade 3 problems in each assignment, and each problem counts 2 points.

Exams

  • There will be three midterms and one final. The following is the schedule

Exam 1

Feburary 5

6:30-8:30p.m.

Exam 2

March 4

6:30-8:30p.m.

Exam 3

April 8

6:30-8:30p.m.

Final

May 2

10:30 a.m.-12:30p.m.

 

  • Exams will consist of a number of multiple choice questions, whose answers you will mark on an answer card for reading by a scanning machine. A portion of each evening exam will consist of a free-response, lovingly hand-graded question, for which partial credit will be given. It is considered your responsibility to make your work clear and legible. If the grader is unable to easily find your answer and understand your work, you will miss points. (The final exam will consist entirely of multiple choice questions.
  • Exam rooms will be assigned before each test. You can look up your room at Exam seat lookup .
  • Exam Materials You should bring the following equipment to each exam:

·                 Your Washington U photo ID card

·                 Several pencils (with erasers)

·                 An approved calculator

·                 3x5 note card with any helpful notes you care to make.

Please do not bring the following with you to your exam:

·                 Notes other than the 3x5 card

·                 Scratch paper (there is plenty of room to write on the test booklet)

·                 Non-approved calculators

  • After multiple choice portion of the exam has been graded (usually the next day), there will be a limited period of time during which you can look at the papers in the Math office to raise questions about mismarked cards and similar issues. After this holding period your exams will be returned to you (possibly in the hallway in Cupples I). The day after the exam (usually between noon and 4PM), scores for the multiple choice portion of the exam can be found here: Exam Scores Exam grades (with the handgraded grades) can be looked up on Telesis .

 

Grading scale 

  • Homework: 20%, Mid1: 20%, Mid2: 20%, Mid3: 20%, Final: 20%. The grades are assigned according the percentage you are in the class.
  • The exam dates (including the final) were set by the College office before you registered for this class. You are therefore expected to take the exams at their scheduled times. If you are away because of a university sporting event or field trip, then you may arrange for your coach or professor to administer the exam. Excused absences may be granted in the case of illness or bereavement. All excused absences must be granted by Professor Shapiro. The final exam date cannot be changed for reasons of traveling convenience.
  • Letter grades will be given based on your overall score. The cutoffs for the various letter grades will be no higher than the following:

A

90

B

75

C

60

D

50

 

  • In total, we will collect 13 homeworks. You are allowed to drop the lowest homework score.
  • The score of the final test can be used to replace the lowest midterm exam score. 

Calculator

  • You are NOT allowed to use a graphing calculator on the exams.  You will be allowed to use a scientific calculator, (for example, a TI30X, generally available for $13 or less).  Be sure the calculator you choose can handle logarithmic, exponential, and trigonometric calculations.  It would be wise to use this calculator when you work your homework problems so you will be comfortable with it when you take the exams.

 

Homework assignments

  • Homework 1(due 1/22) section 1.1 Problem 28, 35, 46 section 1.2 problem 6, 14, 29, 37 section 1.3 problem 5, 14, 27
  • Homework 2(due 1/29) section 1.4 Problem 18,45,47,64 section 1.5 problem 10,17,39,43 section 1.6 problem 11,30
  • Homework 3(due 2/12) section 1.6 Problem 33,36,38 section 2.1 problem 10,16 section 2.2 problem 4,9,23 section 2.3 problem 7,9
  • Homework 4(due 2/12) section 2.4 problem 5,9,10 section 2.5 problem 5,9,10 section 2.6 problem 5,8,9,10
  • Homework 5(due 2/19) section 3.1 problem 10,22,37,40 section 3.2 problem 2,8,16,23 section 3.3 problem 4,5
  • Homework 6(due 2/26) section 3.3 problem 30,40 section 3.4 problem 5,19,23 section 3.5 problem 17,28,37,51 section 3.6 problem 1
  • Homework 7(due 3/18) section 3.6 problem 20,26 section 3.7 problem 3,10 section 3.8 problem 2,4,7,10 section 4.1 problem 12,14(solution only, graph not required)
  • Homework 8(due 3/18) section 4.1 problem 10,24,26 section 4.2 problem 8,10,34 section 4.3 problem 1,8
  • Homework 9(due 3/25) section 5.1 problem 3, 5, 6, 16, 28  section 5.2 problem 4, 10, 18, 20, 27
  • Homework 10 CORRECTION: there is a misprint in problem 5.4.33 in this week's homework. The 9 that appear in the second eigenvector should  be a zero.(due day EXTENDED to 4/3) section 5.4 problem 10,23,26,33 section 5.5 problem 4,17 section 5.6 problem 1,12,25,26
  • Homework 11 (due 4/15) section7.1 problem 14, 21, 22, 28, 31, 38 section 7.2 problem 4, 10, 14, 22.
  • Homework 12 (due 4/15) section 7.2 problem 35 section 7.3 problem 3, 4, 8, 18, 23, 34 section 7.4 section 4, 11, 19
  • Homework13 (due 4/22) section 7.6 problem 5,7,14,15 section 8.1 problem 4,8,18,20 section8.2 problem 2,4