ABSTRACT
Ξ = Ξ(x, y)
of an equation will be presented in Section 1.1. The general solution of the equation is given by
w = Φ(Ξ),
where Φ = Φ(Ξ) is an arbitrary function.
1.1.1 Equations Containing Power-Law Functions ◮ Coefficients of equations are linear in x and y.
