On the Number of Zeros of Nonoscillatory Solutions to Higher-Order Linear Ordinary Differential Equations

 This paper is concerned with the problem of counting the number of zeros of bounded nonoscillatory solutions of higher-order linear ordinary differential equations involving a parameter. It is shown that a recent result for the second-order case is still valid for the higher-order case. Received September 20, 2001; in revised form February 8, 2002 Published online July 12, 2002