Boundary conditions associated with the general left-definite theory for differential operators
Boundary conditions associated with the general left-definite theory for differential operators
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与微分算子的一般左定理论相关的边界条件
DOI:
10.1016/j.jat.2018.10.005
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发表时间:
2019
影响因子:
0.9
通讯作者:
Liaw, Constanze
中科院分区:
文献类型:
--
作者:
Fleeman, Matthew;Frymark, Dale;Liaw, Constanze
In the early 2000s, Littlejohn and Wellman developed so-called n th left-definite theory. Namely, they fully determined the ‘left-definite domains’ and spectral properties of powers of self-adjoint Sturm–Liouville operators associated with classical orthogonal polynomials. We study how these left-definite domains relate with explicit classical Glazman–Krein–Naimark (GKN) boundary conditions. When n is small, we significantly simplify previously challenging analysis by introducing an explicit method for checking whether a given set of functions yields GKN conditions. This reduces to computing the rank of a relatively small matrix. We include explicit computations for n= 2,…, 5. Further, for arbitrary powers n of Sturm–Liouville operators with a complete system of orthogonal eigenfunctions, we show that these left-definite domains are given by GKN boundary conditions involving some of the polynomial eigenfunctions. We also study and extend a conjecture by Littlejohn–Wicks regarding the equality of four different formulations for these domains.
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DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
L. Littlejohn;Quinn Wicks
通讯作者:
Quinn Wicks
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
L. Littlejohn;R. Wellman
通讯作者:
R. Wellman
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
L. Littlejohn;R. Wellman
通讯作者:
R. Wellman
DOI:
--
发表时间:
2010
期刊:
NIST Handbook of Mathematical Functions
影响因子:
--
作者:
T. M. Dunster
通讯作者:
T. M. Dunster
影响因子:
2.4
作者:
V. Domínguez;N. Heuer;F. Sayas
通讯作者:
F. Sayas