HADAMARD FUNCTIONS OF INVERSE M-MATRICES

被引:11
|
作者
Dellacherie, Claude [1 ]
Martinez, Servet [2 ,3 ]
San Martin, Jaime [2 ,3 ]
机构
[1] Univ Rouen, UMR 6085, Lab Raphael Salem, F-76821 Mont St Aignan, France
[2] Univ Chile, CNRS, UMI 2807, Ctr Math Modelling, Santiago, Chile
[3] Univ Chile, CNRS, UMI 2807, Dept Engn Math, Santiago, Chile
关键词
M-matrices; Hadamard functions; ultrametric matrices; potential matrices; GENERALIZED ULTRAMETRIC MATRICES; PRESERVE;
D O I
10.1137/060651082
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We prove that the class of generalized ultrametric matrices (GUM) is the largest class of bipotential matrices stable under Hadamard increasing functions. We also show that any power alpha >= 1, in the sense of Hadamard functions, of an inverse M- matrix is also inverse M- matrix. This was conjectured for alpha = 2 by Neumann in [Linear Algebra Appl., 285 (1998), pp. 277-290], and solved for integer alpha >= 1 by Chen in [Linear Algebra Appl., 381 (2004), pp. 53-60]. We study the class of filtered matrices, which include naturally the GUM matrices, and present some sufficient conditions for a filtered matrix to be a bipotential.
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页码:289 / 315
页数:27
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