首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Completely positive completion of partial matrices whose entries are completely bounded maps
Authors:Koji Furuta
Institution:(1) Department of Mathematics, Musashi Institute of Technology, 158 Tokyo, Japan
Abstract:We study completion problems of partial matrices associated with a graph where entries are completely bounded maps on aC *-algebra. We characterize a graph 
$$\mathcal{G}$$
for which every 
$$\mathcal{G}$$
-partial completely positive matrix has a completely positive completion. As a special case we study 
$$\mathcal{G}$$
-partial functional matrices. We give a necessary and sufficient condition for a 
$$\mathcal{G}$$
-partial functional matrix to have a positive completion and a representation for such matrices. These generalize some results on inflated Schur product maps due to Paulsen, Power and Smith. As an application, we study completely positive completions of partial matrices whose entries are completely bounded multipliers of the Fourier algebra of a locally compact group.
Keywords:primary 46L99  secondary 43A22
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号