Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleOn quadruples of projectors connected by a linear relation.AuthorsYusenko, K.AbstractWe describe the set of γ ∈ ℝ for which there exist quadruples of projectors P i for a fixed collection of numbers αi ℝ+, $$i = \overline {1,4} $$ , such that α1 P 1 + α2 P 2 + α3 P 3 + α3 P 4 = γ I.SubjectsLINEAR operators; ALGEBRA; PROJECTORS; MATHEMATICAL functions; MATHEMATICAL analysisPublicationUkrainian Mathematical Journal, 2006, Vol 58, Issue 9, p1462ISSN0041-5995Publication typeArticleDOI10.1007/s11253-006-0146-x