Differential Equations
Math 244, Spring 2025

Textbook

• Elementary Differential Equations and Boundary Value Problems, by William Boyce and Richard DiPrima (9th Edition)
  

  TEXT NOTE: This is NOT the current version, which is the 12th edition. There are a couple of different versions of the text; here are the links for more information:

• With Boundary Value Problems (Used copies should run under $10.00)
  
• The text without Boundary Value Problems (Link removed- couldn't find a good used copy for a reasonable price).
• There also is an optional Student Solution Manual Available (typically, these have more detailed solutions to odd numbered problems)
• We'll generally be covering topics from Chapters 1-7 except Chapter 4. Also, topics from Chapter 7, 9 as time permits.

Beginning Material

• Syllabus
• Course Calendar
• Homework to Exam 1

Links by Section

• Video lectures from a past semester (Optional- This is here primarily for a backup in case you want to see what we did in class again. You shouldn't rely on this however since it is from a past semester.
• Review Material - Read these at your leisure.
• Defining the Hyperbolic Trig Functions
• Solutions to the Hyperbolic handout
• Integration by Parts using a Table
  • Video summarizing the process.
  • Would you rather watch Edward James Olmos in a classic pre-Battlestar Galactica performance ("Stand and Deliver")?
  • Integration by Parts using a Table (PDF)) Summary and Examples
• Partial Fractions
  • Partial Fraction Decomposition (PDF) Summary and Examples
  • Khan Academy videos on Partial Fractions
• Chapter 1
  • Practice Problems
  • Direction Fields example

Exam Links

Other Links

• An online direction field plotter. You'll need it for 1.1, and in general for plotting the direction fields for first order DEs.
• A good plotter for 2x2 systems (ch 7, 9)