ABSTRACT
1 o . A homogeneous linear equation of the third order has the general form f 3 ( x ) y x x x ″ ′ + f 2 ( x ) y x x ″ + f 1 ( x ) y x ′ + f 0 ( x ) y = 0 . $$ f_{3} (x)y_{{xxx}}^{{\prime\prime\prime}} + f_{2} (x)y_{{xx}}^{{\prime\prime}} + f_{1} (x)y_{x}^{\prime} + f_{0} (x)y = 0 . $$ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315117638/585bf32b-5ab3-4664-8be7-28e9abefef4b/content/math15_1.tif"/>
