Extended Laguerre inequalities and a criterion for real zeros

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Authors
Cardon, David A.
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Abstract
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Let $f(z)=e^{-bz^2}f_1(z)$ where $b \geq 0$ and $f_1(z)$ is a real entire function of genus 0 or 1. We give a necessary and sufficient condition in terms of a sequence of inequalities for all of the zeros of $f(z)$ to be real. These inequalities are an extension of the classical Laguerre inequalities.
Comment: The paper is based on a talk given at the 7th ISAAC Congress held at Imperial College in London in July 2009
Keywords
Mathematics - Complex Variables
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