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《Mathematics in Practice and Theory》 2013-16
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Completion of Semi-Fredholm of Operator Partial Matrices

ZHANG Lan;A Latan Cang;College of Science,Lnner Mongolia University of Technology;School of Mathematics Science,Lnner Mongolia University;  
Let H,K,be separable Hilbert spaces,A ∈B(H),B ∈B(H,K,) and D ∈B(K) are given,N_C =(ABCD).In this paper,we give some sufficient condition for Nc to be upper semi-Predholm(lower semi-Predholm,Fredholm)operator for some C ∈B(K,H).
【Fund】: 国家自然科学基金(10562002);; 内蒙古自然科学基金(2012MS0111);; 内蒙古工业大学校基金(ZS201003)
【CateGory Index】: O177
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