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EXTREME POINTS IN DIAGONAL-DISJOINT IDEALS OF NEST ALGEBRAS

EXTREME POINTS IN DIAGONAL-DISJOINT IDEALS OF NEST ALGEBRAS
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摘要 In this paper, the extreme points of the unit ball of diagonal-disjoint ideals L in nest algebras are characterized completely; Furthermore, it is shown that every extreme point of the unit ball of L has essential-norm one. In this paper, the extreme points of the unit ball of diagonal-disjoint ideals L in nest algebras are characterized completely; Furthermore, it is shown that every extreme point of the unit ball of L has essential-norm one.
作者 董浙 鲁世杰
出处 《Acta Mathematica Scientia》 SCIE CSCD 2002年第2期222-226,共5页 数学物理学报(B辑英文版)
基金 This work was supported by the National Natural Science Foundation of China.
关键词 Diagonal-disjoint ideals extreme points contractive perturbation Diagonal-disjoint ideals, extreme points, contractive perturbation
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参考文献2

  • 1Anoussis M,Katsoulis E G.Compact operators and the geomertic structure of C-algabras[].Proceedings of the American Mathematical Society.1996
  • 2Kadison R V.Isometries of operator algebras[].Annals of Mathematics.1951

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