Chapter 4
Study notes

 4.1 question asked 2/7/2017
 4.2 note on Airy added 1/31/2017
 4.3 note p1 added 2/3/2017
 4.4 note added 1/31/2017
 4.5 note p3 figure 3.4 in text (page 92) reproduced in color
 4.6 note p4 added 2/15/17 animations of the solutions to ODE from lecture 2/9/17 for small parameter
 4.7 note p5 added 2/15/17 animation figure 9.5 in text page 434
 4.8 note p7 added 2/15/17, boundary layer problem solved in details
 4.9 note p9. added 2/24/17, asking question about problem in book
 4.10 note p11. added 3/7/17, Showing that scaling for normalization is same for any \(n\)
 4.11 note p12. added 3/8/17, comparing exact solution to WKB solution using Mathematica
 4.12 Convert ODE to Liouville form
 4.13 note p13. added 3/15/17, solving \(\epsilon ^2 y''(x)=(a+x+x^2)y(x)\) in Maple