Sampling by Averages and Average Splines on Dirichlet Spaces and on Combinatorial Graphs
Sampling by Averages and Average Splines on Dirichlet Spaces and on Combinatorial Graphs
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在狄利克雷空间和组合图上通过平均值和平均样条进行采样
DOI:
10.1007/978-3-030-69637-5_14
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
I. Pesenson
中科院分区:
文献类型:
--
作者:
I. Pesenson
In the framework of a strictly local regular Dirichlet spaceXwe introduce the subspacesPWω,ω> 0, of Paley–Wiener functions of bandwidthω. It is shown that every function inPWω,ω> 0, is uniquely determined by its average values over a family of ballsB(xj,ρ),xj∈X, which form an admissible cover ofXand whose radii are comparable toω−1∕2. The entire development heavily depends on some Poincaré-type inequalities. In the second part of the paper we realize the same idea in the setting of a weighted combinatorial finite or infinite graphG. We have to treat the case of graphs separately since the Poincaré inequalities we are using on them are somewhat different from the Poincaré inequalities in the first part.