Pedersen–Takesaki operator equation and operator equation AX = B in Hilbert C⁎-modules
Pedersen–Takesaki operator equation and operator equation AX = B in Hilbert C⁎-modules
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Pedersen-Takesaki 算子方程和希尔伯特 C-模中的算子方程 AX-=-B
DOI:
10.1016/j.jmaa.2022.126878
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发表时间:
2022-11
影响因子:
1.3
通讯作者:
Qingxiang Xu
中科院分区:
文献类型:
--
作者:
Rasoul Esk;ari;Xiaochun Fang;Mohammad Sal Moslehian;Qingxiang Xu
Let E be a Hilbert C⁎-module and L (E) be the C⁎-algebra of adjointable operators on E. We extend a work of Pedersen and Takesaki to the setting of Hilbert C⁎-modules by giving some equivalent conditions for the existence of a positive solution X of the so-called Pedersen–Takesaki operator equation X H X= K in which H, K∈ L (E). It is known that the Douglas lemma does not hold in the setting of Hilbert C⁎-modules in its general form. If A, B∈ L (E), then the operator inequality B B⁎≤ λ A A⁎ with λ> 0 does not ensure that the operator equation A X= B has a solution, in general. We show that under an orthogonally complemented condition on the range of operators, A X= B has a solution if and only if B B⁎≤ λ A A⁎ and R (A)⊇ R (B B⁎). Furthermore, we prove that if L (E) is a W⁎-algebra, A, B∈ L (E), and R (A⁎)‾= E, then B B⁎≤ λ A A⁎ for some λ> 0 if and only if R (B)⊆ R (A). Several examples are given to support the findings.
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影响因子:
1.1
作者:
T. Furuta
通讯作者:
T. Furuta
影响因子:
1
作者:
Vosough Mehdi;Moslehian Mohammad Sal;Xu Qingxiang
通讯作者:
Xu Qingxiang
DOI:
10.2307/2039084
发表时间:
1972-11
期刊:
--
影响因子:
--
作者:
G. Pedersen;M. Takesaki
通讯作者:
G. Pedersen;M. Takesaki
影响因子:
1
作者:
Manuilov, Vladimir;Moslehian, M. S.;Xu, Qingxiang
通讯作者:
Xu, Qingxiang
影响因子:
1.3
作者:
Cvetkovic-Ilic Dragana;Wang Qing-Wen;Xu Qingxiang
通讯作者:
Xu Qingxiang