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- W3205853722 abstract "begin{abstract} In this manuscript, we answer a list of longstanding open problems on weak phase retrieval including: (1) A complete classification of the vectors ${x_i}_{i=1}^2$ in $RR^3$ that do weak phase retrieval; (2) We show that frames doing weak phase retrieval in $RR^n$ must span $RR^n$; (3) We give an example of a set of vectors doing phase retrieval but their orthogonal complement hyperplanes fail weak phase retrieval; (4) We give a classification of weak phase retrievable frames - which makes clear the difference between phase retrieval and weak phase retrieval; (5) We classify when weak phase retrievable frames also do norm retrieval. We then introduce the notion of weak phase retrieval by projections and develop their basic properties. We then look at phase (norm) retrieval by projections. We end with some open problems. We provide numerous examples to show that our results are best possible. end{abstract}" @default.
- W3205853722 created "2021-10-25" @default.
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- W3205853722 date "2021-10-13" @default.
- W3205853722 modified "2023-09-27" @default.
- W3205853722 title "A note on (weak) phase and norm retrievable Real Hilbert space frames and projections." @default.
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