Zeros of orthogonal polynomials on the real line
Zeros of orthogonal polynomials on the real line
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DOI:
10.1016/s0021-9045(03)00038-8
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发表时间:
2003-04-01
影响因子:
0.9
通讯作者:
Simon, B
中科院分区:
文献类型:
--
作者:
Denisov, SA;Simon, B
Let p(n)(x) be the orthonormal polynomials associated to a measure dmu of compact support in R. If E is not an element of supp(dmu), we show there is a delta > 0 so that for all n, either p(n) or p(n+1) has no zeros in (E - delta, E + delta). If E is an isolated point of supp(mu), we show there is a delta so that for all n, either p(n) or p(n+1) has at most one zero in (E - delta, E + delta). We provide an example where the zeros of p(n) are dense in a gap of supp(dmu). (C) 2003 Elsevier Science (USA). All rights reserved.