ABSTRACT

A homogeneous linear equation of the second order has the general form f 2 ( x ) y x x ′ ′ + f 1 ( x ) y x ′ + f 0 ( x ) y = 0 . $$ {f_2}(x)y_{xx}^{''} + {f_1}(x)y_{x}^{'} + {f_0}(x)y = 0. $$ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315117638/585bf32b-5ab3-4664-8be7-28e9abefef4b/content/math14A_1.tif"/>