Range of a contractive strongly positive projection in a C*-algebra
Andrzej Łuczak
Colloquium Mathematicae, Tome 139 (2015), p. 87-89 / Harvested from The Polish Digital Mathematics Library
Access to full text
Full (PDF)

We generalize a result of Choi and Effros on the range of a contractive completely positive projection in a C*-algebra to the case when this projection is only strongly positive using, moreover, an elementary argument instead of a 2×2-matrix technique.

Publié le : 2015-01-01
EUDML-ID : urn:eudml:doc:283443 
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm140-1-7,
     author = {Andrzej \L uczak},
     title = {Range of a contractive strongly positive projection in a C*-algebra},
     journal = {Colloquium Mathematicae},
     volume = {139},
     year = {2015},
     pages = {87-89},
     zbl = {06440591},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm140-1-7}
}

Andrzej Łuczak. Range of a contractive strongly positive projection in a C*-algebra. Colloquium Mathematicae, Tome 139 (2015) pp. 87-89. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm140-1-7/