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Zero sets, entropy, and pointwise asymptotics of orthogonal polynomials
Journal of Functional Analysis ( IF 1.7 ) Pub Date : 2021-03-17 , DOI: 10.1016/j.jfa.2021.109002 Roman Bessonov , Sergey Denisov
中文翻译:
正交多项式的零集,熵和点渐近性
更新日期:2021-03-22
Journal of Functional Analysis ( IF 1.7 ) Pub Date : 2021-03-17 , DOI: 10.1016/j.jfa.2021.109002 Roman Bessonov , Sergey Denisov
Let μ be a measure from Szegő class on the unit circle and let be the family of Schur functions generated by μ. In this paper, we prove a version of the classical Szegő's formula, which controls the oscillation of on for all . Then, we focus on an analog of Lusin's conjecture for polynomials orthogonal with respect to measure μ and prove that pointwise convergence of almost everywhere on is equivalent to a certain condition on zeroes of .
中文翻译:
正交多项式的零集,熵和点渐近性
令μ为单位圆上Szegő类的度量 然后让 是由μ生成的Schur函数的族。在本文中,我们证明了经典Szegő公式的一个版本,该公式控制着 上 对全部 。然后,我们将重点放在Lusin多项式猜想的模拟上相对于度量μ正交,并证明 几乎到处都有 等价于零的某个条件 。