Self-adjoint Jacobi matrices on trees and multiple orthogonal polynomials
Self-adjoint Jacobi matrices on trees and multiple orthogonal polynomials
复制标题
树和多个正交多项式上的自伴雅可比矩阵
DOI:
10.1090/tran/7959
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发表时间:
2020
影响因子:
1.3
通讯作者:
Yattselev, Maxim L.
中科院分区:
文献类型:
--
作者:
Aptekarev, Alexander I.;Denisov, Sergey A.;Yattselev, Maxim L.
We consider a set of measures on the real line and the corresponding system of multiple orthogonal polynomials (MOPs) of the first and second type. Under some very mild assumptions, which are satisfied by Angelesco systems, we define self-adjoint Jacobi matrices on certain rooted trees. We express their Green’s functions and the matrix elements in terms of MOPs. This provides a generalization of the well-known connection between the theory of polynomials orthogonal on the real line and Jacobi matrices onto a higher dimension. We illustrate the importance of this connection by proving ratio asymptotics for MOPs using methods of operator theory. References
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DOI:
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2017
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