MA 226
Differential Equations
Section A
Spring 2009

Project 1
Project 2
Syllabus (including office hours, phone numbers, etc.)
Homework assignments:
Homework cover sheet
Handouts, demos, etc:
- January 14, 2009
  - Notetaker helper (print out and bring to class)
  - United Nations World Population Estimates
  - U.S. Population Projections by U.S. Census Bureau
  - International Society of Malthus
- January 16, 2009
  - Notetaker helper (print out and bring to class)
- January 21, 2009
  - Notetaker helper (print out and bring to class)
- January 23, 2009
  - Notetaker helper (print out and bring to class)
- January 26, 2009
  - Notetaker helper (print out and bring to class)
- January 28, 2009
  - 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
- January 30, 2009
  - Notetaker helper (print out and bring to class)
- February 2, 2009
  - Notetaker helper (print out and bring to class)
  - Professor Devaney's phase line demo (in Quicktime format)
- February 4, 2009
  - Notetaker helper (print out and bring to class)
- February 6, 2009
  - Notetaker helper (print out and bring to class)
- February 9, 2009
  - Notetaker helper (print out and bring to class)
- February 13, 2009
  - Notetaker helper (print out and bring to class)
  - Article from SCIENCE magazine that was shown in class
- February 17, 2009
  - 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
- February 18, 2009
  - Notetaker helper (print out and bring to class)
  - 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 20, 2009
  - Notetaker helper (print out and bring to class)
- February 23, 2009
  - 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
- February 25, 2009
  - Notetaker helper (print out and bring to class)
  - Animation related to uniqueness for autonomous systems
- February 27, 2009
  - Notetaker helper (print out and bring to class)
- March 4, 2009
  - Notetaker helper (print out and bring to class)
- March 6, 2009
  - Notetaker helper (print out and bring to class)
- March 16, 2009
  - Notetaker helper (print out and bring to class)
- March 18, 2009
  - Notetaker helper (print out and bring to class)
- March 20, 2009
  - Notetaker helper (print out and bring to class)
- March 23, 2009
  - Notetaker helper (print out and bring to class)
- March 27, 2009
  - Notetaker helper (print out and bring to class)
- March 30, 2009
  - Notetaker helper (print out and bring to class)
  - Animation of solutions as the damping parameter is increased (in Quicktime format)
  - Damped harmonic motion demo
    (courtesy of Professor Andrew Duffy, Boston University)
- April 1, 2009
  - Notetaker helper (print out and bring to class)
- April 3, 2009
  - Notetaker helper (print out and bring to class)
- April 6, 2009
  - Notetaker helper (print out and bring to class)
  - Animation of solutions as the forcing frequency changes (in Quicktime format)
- April 8, 2009
  - Notetaker helper (print out and bring to class)
- April 10, 2009
  - Notetaker helper (print out and bring to class)
- April 13, 2009
  - Notetaker helper (print out and bring to class)
- April 15, 2009
  - Notetaker helper (print out and bring to class)
  - Mathematica notebook (optional)
- April 17, 2009
  - Notetaker helper (print out and bring to class)
- April 22, 2009
  - Notetaker helper (print out and bring to class)
- April 24, 2009
  - Notetaker helper (print out and bring to class)
- April 27, 2009
  - Notetaker helper (print out and bring to class)
- April 29, 2009
  - Notetaker helper (print out and bring to class)
Frequently asked questions (FAQ)
- Where can I read about partial fractions on the web?
Old exams:
Answers to our exams: