MA 226
Differential Equations
Section A
Spring 2010

Final exam, discussion section, exam, homework, and final course grades (via blackboard.bu.edu).
Project 1
Project 2
Syllabus (including office hours, phone numbers, etc.)
CD Installation Problems under Vista
Mark's email message about the homework, etc
- Professor Blanchard's addendum related to late or missing assignments
Homework assignments:
Homework cover sheet
Handouts, demos, etc:
- January 13, 2010
  - 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 15, 2010
  - Notetaker helper (print out and bring to class)
- January 20, 2010
  - Notetaker helper (print out and bring to class)
- January 22, 2010
  - Notetaker helper (print out and bring to class)
- January 25, 2010
  - Notetaker helper (print out and bring to class)
- January 27, 2010
  - Notetaker helper (print out and bring to class)
  - Mathematical Association of America's "Year of Euler" (2007) web page
  - William Dunham's wonderful book on Euler
  - 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 29, 2010
  - Notetaker helper (print out and bring to class)
- February 1, 2010
  - Notetaker helper (print out and bring to class)
  - Professor Devaney's phase line demo (in Quicktime format)
- February 3, 2010
  - Notetaker helper (print out and bring to class)
- February 5, 2010
  - Notetaker helper (print out and bring to class)
- February 8, 2010
  - Notetaker helper (print out and bring to class)
- February 12, 2010
  - Notetaker helper (print out and bring to class)
  - Random collection of links related to the regulation of fishing
- February 16, 2010
  - 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 17, 2010
  - 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 19, 2010
  - Notetaker helper (print out and bring to class)
- February 22, 2010
  - Notetaker helper (print out and bring to class)
- February 24, 2010
  - 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 26, 2010
  - Notetaker helper (print out and bring to class)
  - animation related to uniqueness for autonomous systems
- March 1, 2010
  - Notetaker helper (print out and bring to class)
- March 3, 2010
  - Notetaker helper (print out and bring to class)
- March 5, 2010
  - Notetaker helper (print out and bring to class)
- March 15, 2010
  - Notetaker helper (print out and bring to class)
- March 17, 2010
  - Notetaker helper (print out and bring to class)
- March 19, 2010
  - Notetaker helper (print out and bring to class)
- March 22, 2010
  - Notetaker helper (print out and bring to class)
- March 26, 2010
  - Notetaker helper (print out and bring to class)
- March 29, 2010
  - Notetaker helper (print out and bring to class)
  - Animation of solutions as the damping parameter is increased (in Quicktime format)
- March 31, 2010
  - Notetaker helper (print out and bring to class)
- April 2, 2010
  - Notetaker helper (print out and bring to class)
- April 5, 2010
  - Notetaker helper (print out and bring to class)
  - Animation of solutions as the forcing frequency changes (in Quicktime format)
- April 7, 2010
  - Notetaker helper (print out and bring to class)
- April 9, 2010
  - Notetaker helper (print out and bring to class)
- April 12, 2010
  - Notetaker helper (print out and bring to class)
- April 14, 2010
  - Notetaker helper (print out and bring to class)
  - Mathematica notebook (optional)
- April 16, 2010
  - Notetaker helper (print out and bring to class)
- April 21, 2010
  - Notetaker helper (print out and bring to class)
- April 23, 2010
  - Notetaker helper (print out and bring to class)
- April 26, 2010
  - Notetaker helper (print out and bring to class)
- April 28, 2010
  - Notetaker helper (print out and bring to class)
Frequently asked questions (FAQ)
- Where can I read about partial fractions on the web?
Old exams:
- MA 226 exams given in Spring 2009
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.
Answers to our exams: