On Leighton's Comparison Theorem

Ahmed Ghatasheh, Rudi Weikard

We give a simple proof of a fairly flexible comparison theorem for equations of the type $-(p(u^{\prime }+su){)}^{\prime }+rp(u^{\prime }+su)+qu=0$ on a finite interval where $1/p$, $r$, $s$, and $q$ are real…