- 08-165 Jonathan Breuer, Yoram Last, Barry Simon
- The Nevai Condition
(377K, pdf)
Sep 11, 08
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Abstract. We study Nevai's condition that for orthogonal polynomials on the real line, $K_n(x,x_0)^2 K_n(x_0,x_0)^{-1}\, d\rho (x)\to\delta_{x_0}$ where
$K_n$ is the CD kernel.
We prove that it holds for the Nevai class of
a finite gap set uniformly on the spectrum and we provide an example
of a regular measure on $[-2,2]$ where it fails on an interval.
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