https://goodreadsb.blogspot.com/?book=0486828352
A must-read in applied mathematics with invaluable material on differential equations, this is an updated edition of a classic text. Part II of the two-volume series explores approximate methods, variational methods, solutions of Laplace's and Poisson's equations, the wave equation, diffusion and wave mechanics, and vector fields. Each chapter concludes with reinforcing problem sets, and an Appendix features numerous helpful tables.