N.2 History and wish list

• Jan. 11, 2011. The first version of this manuscript was posted.

• Jan. 14, 2011. A spell check was done. Various provements in the first chapter were made.

• Jan.-Feb. xx, 2011. Various additions, improvements.

• Feb. 16, 2011. Version 0.7 alpha. Some corrections. Made explanation of classification scheme a separate subsection.

• Feb. 18, 2011. Version 0.9 alpha. Various minor rewrites.

• Feb. 21, 2011. Version 0.10 alpha. Various minor rewrites and corrections.

• Feb. 23, 2011. Version 0.11 alpha. Various minor rewrites and corrections. Added energy method for heat and wave equation.

• Feb. 22, 2011. Version 0.12 alpha. Various minor rewrites and corrections. Added questions for Laplace energy methods.

• Mar. 10, 2011. Version 0.13 alpha. Added new intro for Green’s functions. Added questions for Green’s functions.

• Mar. 18, 2011. Version 0.14 alpha. Added new intro for Poisson’s integral formula. Added questions for Poisson’s integral formula.

• Mar. 21, 2011. Version 0.15 alpha. Reorganized notes. Cleaned up first order PDE a bit.