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Linear Combinations of Projections in Type III Factors.

Authors :
Goldstein, Stanisław
Paszkiewicz, Adam
Source :
Integral Equations & Operator Theory; Dec2022, Vol. 94 Issue 4, p1-32, 32p
Publication Year :
2022

Abstract

It is shown that every self-adjoint operator in a σ -finite von Neumann factor of type III can be written as a real linear combination of 3 projections. This is in stark contrast to factors of type I ∞ , I I 1 and I I ∞ , where there are always operators that require at least 4 projections in such a representation. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0378620X
Volume :
94
Issue :
4
Database :
Complementary Index
Journal :
Integral Equations & Operator Theory
Publication Type :
Academic Journal
Accession number :
159794556
Full Text :
https://doi.org/10.1007/s00020-022-02712-5