Bounds for Products of Zeros of Solutions to Nonhomogeneous ODE with Polynomial Coefficients

We consider the equation u″=P(z)u+F(z)  (z∈C), where P(z) is a polynomial and F(z) is an entire function. Let zk(u)  (k=1,2,…) be the zeros of a solution u(z) to that equation. Lower estimates for the products ∏k=1j|zk(u)|  (j=1,2,…) are derived. In particular, they give us a bound for the zero free...

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Bibliographic Details
Main Author: Michael Gil’
Format: Article
Language:English
Published: Wiley 2015-01-01
Series:International Journal of Differential Equations
Online Access:http://dx.doi.org/10.1155/2015/690519
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