Determining sets for the discrete Laplacian

被引:1
|
作者
Rubinstein, Aviad [1 ]
Rubinstein, Jacob [1 ]
Wolansky, Gershon [1 ]
机构
[1] Indiana Univ, Dept Math, Bloomington, IN 47405 USA
关键词
Laplacian; determining sets; uniqueness;
D O I
10.1137/050645233
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We define a notion of determining sets for the discrete Laplacian in a domain Omega. A set D is called determining if harmonic functions are uniquely determined by providing their values on D, and if D has the same size as the boundary of Omega. It is shown that there exist determining sets that are fairly evenly distributed in Omega. A number of basic properties of determining sets are derived.
引用
收藏
页码:315 / 324
页数:10
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