An upper bound for the distance between a zero and a critical point of a solution of a second order linear differential equation
This paper presents an upper bound for the distance between a zero and a critical point of a solution of the second order linear differential equation (p(x)y?)?+q(x)y(x)=0 ( p ( x ) y ? ) ? + q ( x ) y ( x ) = 0 , with p(x),q(x)>0 p ( x ) , q ( x ) > 0 . It also compares it with previous results.
second order linear differential equation distance between zeroes and critical points disfocality prufer transformation