$P(\omega )/\textrm {fin}$ and projections in the Calkin algebra
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- by Eric Wofsey PDF
- Proc. Amer. Math. Soc. 136 (2008), 719-726 Request permission
Abstract:
We investigate the set-theoretic properties of the lattice of projections in the Calkin algebra of a separable infinite-dimensional Hilbert space in relation to those of the Boolean algebra $P(\omega )/\operatorname {fin}$, which is isomorphic to the sublattice of diagonal projections. In particular, we prove some basic consistency results about the possible cofinalities of well-ordered sequences of projections and the possible cardinalities of sets of mutually orthogonal projections that are analogous to well-known results about $P(\omega )/\operatorname {fin}$.References
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- K. Kunen, Set Theory: An Introduction to Independence Proofs, North-Holland, 1980.
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Additional Information
- Eric Wofsey
- Affiliation: Department of Mathematics, Washington University in Saint Louis, Saint Louis, Missouri 63130
- Email: erwofsey@artsci.wustl.edu
- Received by editor(s): September 26, 2006
- Received by editor(s) in revised form: December 28, 2006
- Published electronically: November 6, 2007
- Communicated by: Julia Knight
- © Copyright 2007
American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication. - Journal: Proc. Amer. Math. Soc. 136 (2008), 719-726
- MSC (2000): Primary 03E35; Secondary 46L05
- DOI: https://doi.org/10.1090/S0002-9939-07-09093-4
- MathSciNet review: 2358514