A non-commutative Positivstellensatz on isometries

TitleA non-commutative Positivstellensatz on isometries
Publication TypeJournal Article
Year of Publication2004
AuthorsHelton JW, Putinar M, McCullough SA
JournalJOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK
Volume568
Pagination71-80
Date PublishedMAR