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The Weak Density of the Rank One Subalgebra in Completely Distributive Subspace Lattice Algebras and a Characterization of Nest Algebras
Peng Tong LI(1),Shi Jie LU(2)
Acta Mathematica Sinica, Chinese Series
2002, 45 (1):
59-64.
DOI: 10.12386/A2002sxxb0008
If A is a completely distributive subspace lattice algebra on a Hilbert space, then the rank one subalgebra of A is weak dense in A if and only if, the weak closures of the first and the second preannihilators of A in the space of all trace class operators are reflexive. If A is a nest algebra, then Lat, A , the nest of all invariant subspaces of A, is maximal if and only if, all of the weak closed subspaces of A containing A-are reflexive.
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