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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...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Springer International Publishing
2016
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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 |
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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 |