Results 41 to 50 of about 1,262 (79)

Quantum injectivity of G-frames in Hilbert spaces

open access: yesDemonstratio Mathematica
Inspired by some recent work on the quantum detection problem by discrete frames and continuous frames, in this article, we examine the quantum detection problem with G-frames.
Hong Guoqing, Wan Linbin, Zhang Jianxia
doaj   +1 more source

An inequality for bi-orthogonal pairs

open access: yes, 2009
We use Salem's method to prove that there is a lower bound for partial sums of series of bi-orthogonal vectors in a Hilbert space, or the dual vectors. This is applied to some lower bounds on $L^{1}$ norms for orthogonal expansions.
Meaney, Christopher
core   +1 more source

On the relation of the frame-related operators of fusion frame systems. [PDF]

open access: yesSampl Theory Signal Process Data Anal, 2023
Köhldorfer L, Balazs P.
europepmc   +1 more source

Compare and contrast between duals of fusion and discrete frames

open access: yes, 2016
Fusion frames are valuable generalizations of discrete frames. Most concepts of fusion frames are shared by discrete frames. However, the dual setting is so complicated.
Arefijamaal, Ali Akbar, Osgooei, Elnaz
core   +1 more source

Localization of Fréchet Frames and Expansion of Generalized Functions. [PDF]

open access: yesBull Malays Math Sci Soc, 2021
Pilipović S, Stoeva DT.
europepmc   +1 more source

Closure of dilates of shift-invariant subspaces

open access: yesOpen Mathematics, 2013
Soto-Bajo Moisés
doaj   +1 more source

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