منابع مشابه
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G-Frames in Hilbert spaces are a redundant set of operators which yield a representation for each vector in the space. In this paper we investigate the connection between g-frames, g-orthonormal bases and g-Riesz bases. We show that a family of bounded operators is a g-Bessel sequences if and only if the Gram matrix associated to its denes a bounded operator.
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ژورنال
عنوان ژورنال: Cadernos de Saúde Pública
سال: 1986
ISSN: 0102-311X
DOI: 10.1590/s0102-311x1986000300004