MA 226
Differential Equations
Section A
Spring 2005

Final exam, discussion section, exam, homework, and final course grades (via CourseInfo)
Project 1
Project 2 (updated version)
Syllabus (including office hours, phone numbers, etc.)
Class conduct
Marina's email message about the homework, etc
Homework assignments:
Handouts, Demos, etc:
- January 19, 2005
  - Notetaker helper (print out and bring to class)
- January 21, 2005
  - Notetaker helper (print out and bring to class)
- January 24, 2005
  - Notetaker helper (print out and bring to class)
- January 28, 2005
  - Notetaker helper (print out and bring to class)
- January 31, 2005
  - Notetaker helper (print out and bring to class)
- February 2, 2005
  - Notetaker helper (print out and bring to class)
  - spreadsheets for dy/dt = y² - t
    - basic implementation of Euler's method
    - Euler's method with slider
  - spreadsheet for dy/dt = e^t sin y
- February 4, 2005
  - Notetaker helper (print out and bring to class)
- February 7, 2005
  - Notetaker helper (print out and bring to class)
- February 9, 2005
  - Notetaker helper (print out and bring to class)
  - Professor Devaney's phase line demo (in Quicktime format)
- February 11, 2005
  - Notetaker helper (print out and bring to class)
- February 14, 2005
  - Notetaker helper (print out and bring to class)
- February 18, 2005
  - Notetaker helper (print out and bring to class)
- February 22, 2005
  - Notetaker helper (print out and bring to class)
  - One solution to the predator-prey system graphed in 3D
  - A solution curve and its corresponding component graphs (in Quicktime format)
    solution curve from predator-prey system
  - Three solution curves and their corresponding component graphs (in Quicktime format)
    illustrates the phase portrait for the predator-prey system
  - One solution to mass-spring system graphed in 3D
  - Two solutions to mass-spring system graphed in 3D (BIG: 900 KB)
    illustrates the concept of the phase portrait
- February 23, 2005
  - Notetaker helper (print out and bring to class)
- February 25, 2005
  - Notetaker helper (print out and bring to class)
- February 28, 2005
  - Notetaker helper (print out and bring to class)
  - spreadsheet for Euler's method for systems
  - spreadsheet for Euler's method for a predator-prey system
- March 2, 2005
  - Notetaker helper (print out and bring to class)
  - Animation related to uniqueness for autonomous systems
- March 4, 2005
  - Notetaker helper (print out and bring to class)
- March 14, 2005
  - Notetaker helper (print out and bring to class)
- March 16, 2005
  - Notetaker helper (print out and bring to class)
- March 18, 2005
  - Notetaker helper (print out and bring to class)
- March 21, 2005
  - Notetaker helper (print out and bring to class)
- March 23, 2005
  - Notetaker helper (print out and bring to class)
- March 25, 2005
  - Notetaker helper (print out and bring to class)
- March 28, 2005
  - Notetaker helper (print out and bring to class)
- April 1, 2005
  - Notetaker helper (print out and bring to class)
- April 4, 2005
  - Notetaker helper (print out and bring to class)
  - Animation of solutions as the damping parameter is increased (in Quicktime format)
- April 6, 2005
  - Notetaker helper (print out and bring to class)
- April 8, 2005
  - Notetaker helper (print out and bring to class)
- April 11, 2005
  - Notetaker helper (print out and bring to class)
  - Animation of solutions as the forcing frequency changes (in Quicktime format)
- April 13, 2005
  - Notetaker helper (print out and bring to class)
- April 15, 2005
  - Notetaker helper (print out and bring to class)
- April 20, 2005
  - Notetaker helper (print out and bring to class)
- April 22, 2005
  - Notetaker helper (print out and bring to class)
- April 25, 2005
  - Notetaker helper (print out and bring to class)
- April 27, 2005
  - Notetaker helper (print out and bring to class)
- April 29, 2005
  - Notetaker helper (print out and bring to class)
- May 2, 2005
  - Notetaker helper (print out and bring to class)
Population modeling
BU Differential Equations Home Page
- Errata
Frequently asked questions (FAQ)
Homework Cover Sheet
webODEs: I have been experimenting with an "on-line" symbolic ODE solver. Please try it out and let me know what you think. Our current license with the webMathematica folks only allows for two users at the same time, so you may have to wait a little while to get your answer.
MATLAB: Now that we have DETools, we do not use MATLAB in MA 226 as much as in prior semesters. However, some of my students who know MATLAB like to use the dfield and pplane programs that were developed by Professor John Polking of Rice University. Here is some related information:
By the way, Professor Polking's MATLAB routines are available from his web site, but the versions that I have placed on ACS are modified to conform to our notation, so I recommend your going to ACS rather than downloading any files from Rice.
Java versions of dfield and pplane: Professor John Polking of Rice University has also worked with his colleagues to produce Java versions of dfield and pplane. The advantage of the Java versions is that you can run them inside of a Java-enabled browser. You do NOT need MATLAB! These Java programs are available at http://math.rice.edu/~dfield/dfpp.html. If you decide to use these programs, make sure that you have an appropriate version of Netscape or Explorer.
Old exams:

MA 226 Differential Equations Section A Spring 2005

MA 226
Differential Equations
Section A
Spring 2005