مشخصات پژوهش

عنوان	THE ALGEBRA OF BESSEL SEQUENCES AND MEANS OF FRAMES IN HILBERT SPACES
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Bessel sequence, positive frame, frame operator, means of frames
چکیده	In this paper, a one-to-one correspondence between Bessel sequences and bounded linear operators is provided. This leads to an algebra structure on the set of all Bessel sequences in a separable Hilbert space. Some kinds of frames as special classes of operators are considered. Also, normal Bessel sequences and positive frames are presented. Finally, power means of positive frames are introduced. These allow researches to construct a large number of new frames from existing frames.
پژوهشگران	مرتضی رحمانی (نفر سوم)، اصغر رحیمی (نفر دوم)، اسماعیل علیزاده (نفر اول)