differential equations, Mechanics, and Computation
Perm url with updates: http://xahlee.org/math/blog.html
My friend, professor Richard Palais, co-authored with his son Robert Palais a new book “Differential Equations, Mechanics, and Computation”. I've been hired to help them update the site. The result is this: ode-math.com. Half of the book is free in PDF files. Also, lots of java applets and animation files are coming.