عنوان مجله
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Miskolc Mathematical Notes
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چکیده
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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.
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