MA 226
Differential Equations
Section A
Spring 2003

Office hours during final exam period and final exam fact sheet
Syllabus
Project 1
Project 2
Homework assignments:
Handouts, Demos, etc:
- January 15, 2003
  - Notetaker helper
- January 17, 2003
  - Notetaker helper
- January 22, 2003
  - Notetaker helper
- January 24, 2003
  - Notetaker helper
- January 27, 2003
  - Notetaker helper
  - spreadsheets for dy/dt = y^2 - t
    - basic implementation of Euler's method
    - Euler's method with slider
  - spreadsheet for dy/dt = e^t sin y
- January 29, 2003
  - Notetaker helper
- January 31, 2003
  - Notetaker helper
  - Professor Devaney's phase line demo (in Quicktime format)
- February 3, 2003
  - Notetaker helper
- February 5, 2003
  - Notetaker helper
- February 7, 2003
  - Notetaker helper
- February 10, 2003
  - Notetaker helper
- February 14, 2003
  - Notetaker helper
- February 19, 2003
  - Notetaker helper
  - One solution to mass-spring system
  - Two solutions to mass-spring system (900 KB = BIG)
    illustrates the concept of the phase portrait
- February 21, 2003
  - Notetaker helper
  - A solution curve and its corresponding component graphs (in Quicktime format)
    solution curve from predator-prey system
- February 24, 2003
  - Notetaker helper
- February 26, 2003
  - Notetaker helper
  - spreadsheet for Euler's method for systems
  - spreadsheet for Euler's method for a predator-prey system
  - Animation related to uniqueness for autonomous systems
- February 28, 2003
  - Notetaker helper
- March 3, 2003
  - Notetaker helper
- March 5, 2003
  - Notetaker helper
- March 7, 2003
  - Notetaker helper
- March 17, 2003
  - Notetaker helper
- March 19, 2003
  - Notetaker helper
- March 21, 2003
  - Notetaker helper
- March 24, 2003
  - Notetaker helper
- March 28, 2003
  - Notetaker helper
  - Animation of solutions as the damping parameter is increased (in Quicktime format)
- March 31, 2003
  - Notetaker helper
- April 2, 2003
  - Notetaker helper
- April 4, 2003
  - Notetaker helper
- April 7, 2003
  - Notetaker helper
- April 9, 2003
  - Notetaker helper
- April 11, 2003
  - Notetaker helper
- April 14, 2003
  - Notetaker helper
- April 16, 2003
  - Notetaker helper
- April 18, 2003
  - Notetaker helper
- April 23, 2003
  - Notetaker helper
- April 25, 2003
  - Notetaker helper
- April 28, 2003
  - Notetaker helper
Frequently asked questions (FAQ)
Homework Cover Sheet
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.
Answers to our exams:
Old exams:
- MA 226 exams given in Spring 1998
- MA 226 exams given in Spring 2000
Professor Diane Meuser's Tuesday Night Math Help
United Nations World Population Estimates
U.S. Census Bureau: National Population Projections