This is the practical introduction to the analytical approach taken in
Volume 2. Based upon courses in partial differential equations over the
last two decades, the text covers the classic canonical equations, with
the method of separation of variables introduced at an early stage. The
characteristic method for first order equations acts as an introduction
to the classification of second order quasi-linear problems by
characteristics. Attention then moves to different co-ordinate systems,
primarily those with cylindrical or spherical symmetry. Hence a
discussion of special functions arises quite naturally, and in each case
the major properties are derived. The next section deals with the use of
integral transforms and extensive methods for inverting them, and
concludes with links to the use of Fourier series.