"Classification of Lower Frame and Riesz-Fischer Sequences by Unbounded Operators"Shamsabadi, MitraIn this paper, we investigate the properties of (possibly unbounded) frame-related operators of an arbitrary sequence. In particular we characterize all Riesz-Fischer sequences and lower frame sequences by (a particular version of) the synthesis operators. |
| http://univie.ac.at/projektservice-mathematik/e/talks/Shamsabadi_2021-08_Shamsabadi_2021-06_Online_ICCHA_2021-revised.pdf |
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