David L. Jagerman 
Discriminant of Hill’s Equation [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The transformed equation is then solved by rewriting it as an integral equation and employing the process of successive approximations. The solutions thus obtained are asymptotic in w. An explicit asymptotic development of the dis criminant is given with an error term of O(|ml’