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Maximal nests in the Calkin algebra


Author: Don Hadwin
Journal: Proc. Amer. Math. Soc. 126 (1998), 1109-1113
MSC (1991): Primary 47D25, 04A30
DOI: https://doi.org/10.1090/S0002-9939-98-04233-6
MathSciNet review: 1443829
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Abstract: We prove that if two countable commutative lattices of projections in the Calkin algebra are order isomorphic, then they are unitarily equivalent. We show that there are isomorphic maximal nests of projections in the Calkin algebra that are order isomorphic but not similar. Assuming the continuum hypothesis, we show that all maximal nests of projections in the Calkin algebra are order isomorphic.


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Additional Information

Don Hadwin
Affiliation: Department of Mathematics, University of New Hampshire, Durham, New Hampshire 03824
Email: don@math.unh.edu

DOI: https://doi.org/10.1090/S0002-9939-98-04233-6
Received by editor(s): September 23, 1996
Communicated by: Palle E. T. Jorgensen
Article copyright: © Copyright 1998 American Mathematical Society

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