排序方式: 共有53条查询结果,搜索用时 15 毫秒
41.
David R. Pitts 《K-Theory》1989,2(6):737-752
In this paper we compute the K
0 group of any nest subalgebra of (). 相似文献
42.
Nest‐shaped cluster [CuBr(bpy)2][MoOS3Cu3Br2(bpy)] was synthesized by the treatment of (NH4)2 MOO2S2, CuBr and Et4NBr with bpy (2,2′‐bipyridyl) in CH3CN. Its structure has been characterized by X‐ray diffraction; monoclinic, space group P21/n ‐ with a = l.0092(4), b = 2.6347(7), c = 1.4087(3) nm, β = 91.744(9)°, V = 3.7438 nm3, Z=4, and final R = 0.051, Rw = 0.053. It consists of two parts: nest‐shaped structural unit [MoOS3Cu3Br2(bpy)] and complex ion [CuBr(bpy)2]+. We determined its third‐order nonlinear optical (NLO) properties with a 7‐ns pulsed laser at 532 nm. The duster exhibits strong NLO refractive behavior, its third‐order susceptibility χ(3) was calculated to be 2.7 · 10?11 esu in a 7.8 · 10?4 g/cm3 DMF solution. The value is comparable to those of inorganic dusters. 相似文献
43.
设H是实Hilber空间, (?)是B(H)中含恒等算子I的算子代数,若(?) 是从(?)到B(H)的线性映射,如果(?)满足对任意的T∈(?),有(?)(T2)=T*(?)(T)+ (?)(T)T-T*(?)(I)T,则称(?)是一个广义Jordan*-左导子;如果(?)满足对任意的T∈(?), 有(?)(T)(ker(T))(?)ran(T*),则称(?)是一个左*-核值保持映射.本文主要获得了如下 结果: Nest代数上每个弱算子拓扑连续的左*-核值保持映射是广义Jordan*-左内 导子,即存在A,B∈B(H),使得对任意的T∈(?),有(?)(T)=T*A+BT.特别地,(?) 也是一个广义Jordan*-左导子. 相似文献
44.
本文主要讨论von Neumann代数中套子代数的摄动.给出了因子von Neumann代数中套相似的一个充分条件.证明了任何因子von Neumann代数中相邻的套子代数经由一个邻近于单位元的可逆算子是相似的. 相似文献
45.
DONG Zhe 《数学年刊B辑(英文版)》2003,24(3):323-330
This paper studies the tensor product RN RM of Jacobson radicals in nest algebras, and obtains that RN RM = {T∈B(H1 H2) : T(N M)(?)N_ M_, N∈N,M∈M}; and based on the characterization of rank-one operators in RN RM,it is proved that if N, M are non-trivial then RN RM=R if and only if N, M are continuous. 相似文献
46.
本文引入了Banach代数上线性映射的Lie不变子空间,给出了因子VonNeumann代数中套子代数上以导子空间为Lie不变子空间的线性映射的一般形式,研究了Lie导子与Lie自同构的概念及了Lie导子与Lie自同构半群的关系. 相似文献
47.
48.
49.
Throughoutthispaper,thenonzeroHilbertspaceHunderconsiderationiscomlexandseparable.LetB(H)bethesetofallinearboundedoperatorson... 相似文献
50.
本文证明了:Banach空间上完全分配格代数间的导子都是自动连续的;进而证明了套代数的可加导子是内的,套代数间的代数同构是自动连续的、空间的 相似文献