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Frame related sequences in tensor product of Hilbert spaces

Hemalatha M

math.FAarXiv:2608.20716

Abstract

We study frames and related sequences in tensor products of separable Hilbert spaces from an algebraic perspective. For sequences \fn\n∈N ⊂ H1 and \gm\m∈N ⊂ H2, we consider the tensor sequence \fn gm\n,m∈N in H1 H2. We characterize the lower semi-frame and Riesz--Fischer properties of tensor sequences in terms of the corresponding properties of the component sequences. These results extend to infinite tensor products. In addition, we study the action of tensor sums of operators on frame-related sequences in tensor product Hilbert spaces.

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