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作为wA(p,r)算子类的一个推广,该文介绍了一类更广泛的算子类即 wF(p,r,q)算子类,它包含A(p,r)类而含于F(p,r,q)类之中, 进而考虑了该类算子的特征, 包含关系, 正规性和幂性质等等. 相似文献
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We shall give some results on generalized aluthge transformation for p-hyponormal and log-hyponormal operators.We shall also discuss the best possibility of these results. 相似文献
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杨长森 《数学物理学报(B辑英文版)》2008,28(4):998-1002
Furuta showed that if A≥B≥0,then for each r≥0,f(p)=(A^r/2 B^p A^r/2)^t+r/p+r is decreasing for p≥t≥0.Using this result,the following inequality(C^r/2(AB^2A)^δC^ r/2)^ p-1+r/4δ+r ≤C^p-1+r is obtained for 0〈p ≤1,r≥1,1/4≤δ≤1 and three positive operators A, B, C satisfy(A^1/2BA^1/2)^p/2≤A^p,(B^1/2AB^1/2)^p/2≥B^p,(C^1/2AC^1/2)^p/2≤C^p,(A^1/2CA^1/2)^p/2≥A^p. 相似文献
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在条件p>0,r 0及q 1下,我们给出(p,r,q)-仿正规算子的一个特征,进而显示了该特征的一些应用. 相似文献
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IllltllodllCtIOllLetHdenoteacomplexHllbertspace.LetB(H)beacomplexBanachspaceofallboundedlinearoperatorsonH,andB(H)”,thecolljugatespaceofB(H).TherealandimaginarypartsofanoperatorAonXaredenotedbyReAandImA,respectively,l.e。D。A一T,、、A_一Ti,**,。、.._TT。-_,。,、,、__。、、。_、。^。_,、、_。,,、。_^。nireH”一十,lmH“=------.rortWOInirm1LlanOperaLOrSH.nOllrr。weWriteH5otoIndicatethatB—AIsapositiveoperator.i.e,((B—A)。,… 相似文献
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若E,F是Banach空间,E自反,u^2 E→F为有界线性算子,本文得到了u的Gelfand数ce(u)与u的entropy数en(u)之间的关系. 相似文献
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1 Main Results and ProofsClassical shift operator S on 11 is defined by S(co, clt' .) = (0, col c19' .). For any yector(al, a2,' .) E l., define the operator (al, a2,' .) @ ek: 11 - 11 byNow,we consider the following generalized shift operator:Definition 1 T is said to be power bounded if slip. liT"II < co.Definition 2 Let f(z) = Bo Blz ' be operator valued analytic function in theunit disk D,where Ba: IT ~ l? are bounded linear operator,llBk 11 = sup,Sjsm(Z:=, la::) 1),Ba =… 相似文献
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该文的目的是通过研究一个一般的迭代过程, 来寻求一族非扩张映射的不动点集与强单调映射的变差不等式解集的公共元素. 相似文献
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杨长森 《数学物理学报(B辑英文版)》2003,23(3)
Let X be a Banach space and {e_j}_(j=1)~∞ be a sequence in X. The author showsthat {e_j}_(j=1)~∞ is a basic sequence if and only if ∑_(n=1)~∞, r_nα_(nj) converges for every j≥1 and∑_(n=1)~∞ r_n ∑_(j=1)~∞, α_(nj)e_j=∑_(j=1)~∞,(∑_(n=1)~∞ r_nα_(nj))e_j holds for every choice of scalar variables{α_(nj)} such that ∑_(j=1)~∞ α_(nj)e_j converges for each n≥1 and any choice of scalar variables{r_n} such that ∑_(n=1)~∞ ∑_(j=1)~∞, r_nα_(nj)e_j converges. Moreover, some applications about theresult are given. 相似文献