On C*-algebras cut down by closed projections: Characterizing elements viathe extreme boundary

Citation
Lg. Brown et Nc. Wong, On C*-algebras cut down by closed projections: Characterizing elements viathe extreme boundary, TAIWAN J M, 5(2), 2001, pp. 433-441
Citations number
21
Categorie Soggetti
Mathematics
Journal title
TAIWANESE JOURNAL OF MATHEMATICS
ISSN journal
10275487 → ACNP
Volume
5
Issue
2
Year of publication
2001
Pages
433 - 441
Database
ISI
SICI code
1027-5487(200106)5:2<433:OCCDBC>2.0.ZU;2-X
Abstract
Let A be a C*-algebra. Let z be the maximal atomic projection and p a close d projection in A**. It is known that x in A** has a continuous atomic part , i.e., zx = za for some a in A, whenever x is uniformly continuous on the set of pure states of A. Under some additional conditions, we shall show th at if x is uniformly continuous on the set of pure states of A supported by p, or its weak* closure, then pxp has a continuous atomic part, i.e., zpxp = zpap for some a in A.