Cargando…

Infinite order decompositions of C*-algebras

The present paper is devoted to infinite order decompositions of C*-algebras. It is proved that an infinite order decomposition (IOD) of a C*-algebra forms the complexification of an order unit space, and, if the C*-algebra is monotone complete (not necessarily weakly closed) then its IOD is also mo...

Descripción completa

Detalles Bibliográficos
Autor principal: Nematjonovich, Arzikulov Farhodjon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5074999/
https://www.ncbi.nlm.nih.gov/pubmed/27818865
http://dx.doi.org/10.1186/s40064-016-3468-7
_version_ 1782461792915554304
author Nematjonovich, Arzikulov Farhodjon
author_facet Nematjonovich, Arzikulov Farhodjon
author_sort Nematjonovich, Arzikulov Farhodjon
collection PubMed
description The present paper is devoted to infinite order decompositions of C*-algebras. It is proved that an infinite order decomposition (IOD) of a C*-algebra forms the complexification of an order unit space, and, if the C*-algebra is monotone complete (not necessarily weakly closed) then its IOD is also monotone complete ordered vector space. Also it is established that an IOD of a C*-algebra is a C*-algebra if and only if this C*-algebra is a von Neumann algebra. As a summary we obtain that the norm of an infinite dimensional matrix is equal to the supremum of norms of all finite dimensional main diagonal submatrices of this matrix and an infinite dimensional matrix is positive if and only if all finite dimensional main diagonal submatrices of this matrix are positive.
format Online
Article
Text
id pubmed-5074999
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Springer International Publishing
record_format MEDLINE/PubMed
spelling pubmed-50749992016-11-04 Infinite order decompositions of C*-algebras Nematjonovich, Arzikulov Farhodjon Springerplus Research The present paper is devoted to infinite order decompositions of C*-algebras. It is proved that an infinite order decomposition (IOD) of a C*-algebra forms the complexification of an order unit space, and, if the C*-algebra is monotone complete (not necessarily weakly closed) then its IOD is also monotone complete ordered vector space. Also it is established that an IOD of a C*-algebra is a C*-algebra if and only if this C*-algebra is a von Neumann algebra. As a summary we obtain that the norm of an infinite dimensional matrix is equal to the supremum of norms of all finite dimensional main diagonal submatrices of this matrix and an infinite dimensional matrix is positive if and only if all finite dimensional main diagonal submatrices of this matrix are positive. Springer International Publishing 2016-10-21 /pmc/articles/PMC5074999/ /pubmed/27818865 http://dx.doi.org/10.1186/s40064-016-3468-7 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Research
Nematjonovich, Arzikulov Farhodjon
Infinite order decompositions of C*-algebras
title Infinite order decompositions of C*-algebras
title_full Infinite order decompositions of C*-algebras
title_fullStr Infinite order decompositions of C*-algebras
title_full_unstemmed Infinite order decompositions of C*-algebras
title_short Infinite order decompositions of C*-algebras
title_sort infinite order decompositions of c*-algebras
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5074999/
https://www.ncbi.nlm.nih.gov/pubmed/27818865
http://dx.doi.org/10.1186/s40064-016-3468-7
work_keys_str_mv AT nematjonovicharzikulovfarhodjon infiniteorderdecompositionsofcalgebras