Results 1 to 10 of about 3,908,270 (279)

ON HILBERT-SCHMIDT OPERATORS BETWEEN NON-SEPARABLE HILBERT SPACES

open access: yesAl-Ulum
We first study Hilbert–Schmidt operators between non-separable Hilbert spaces. We employ concepts such as summable families in normed spaces, the packet summation theorem, and Hilbert bases.
Lucien Tebua Limalo Koto   +4 more
doaj   +1 more source

Crossing complexity of space-filling curves reveals entanglement of S-phase DNA.

open access: yesPLoS ONE, 2020
Space-filling curves have been used for decades to study the folding principles of globular proteins, compact polymers, and chromatin. Formally, space-filling curves trace a single circuit through a set of points (x,y,z); informally, they correspond to a
Nick Kinney   +3 more
doaj   +1 more source

Dynamics for holographic codes

open access: yesJournal of High Energy Physics, 2020
We describe how to introduce dynamics for the holographic states and codes introduced by Pastawski, Yoshida, Harlow and Preskill. This task requires the definition of a continuous limit of the kinematical Hilbert space which we argue may be achieved via ...
Tobias J. Osborne, Deniz E. Stiegemann
doaj   +1 more source

Compressed Sensing in Hilbert Spaces [PDF]

open access: yes, 2017
In many linear inverse problems, we want to estimate an unknown vector belonging to a high-dimensional (or infinite-dimensional) space from few linear measurements. To overcome the ill-posed nature of such problems, we use a low-dimension assumption on the unknown vector: it belongs to a low-dimensional model set. The question of whether it is possible
Traonmilin, Yann   +3 more
openaire   +3 more sources

Some approximate Gauss–Newton-type methods for nonlinear ill-posed problems; pp. 227–237 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2013
This paper treats numerical methods for solving the nonlinear ill-posed equation F(x) = 0, where the operator F is a Fréchet differentiable operator from one Hilbert space into another Hilbert space.
Inga Kangro, Raul Kangro, Otu Vaarmann
doaj   +1 more source

The nonperturbative Hilbert space of quantum gravity with one boundary

open access: yesJournal of High Energy Physics
We discuss a basis for the nonperturbative Hilbert space of quantum gravity with one asymptotic boundary. We use this basis to show that the Hilbert space for gravity with two disconnected boundaries factorizes into a product of two copies of the single ...
Vijay Balasubramanian, Tom Yildirim
doaj   +1 more source

Aproximate Cycles of the Second Kind in Hilbert space for a Generalized Barbashin-Ezeilo Problem

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012
In this work we show that the Volterra integral operator defined on the space of absolutely stable functions induces an asymptotically pseudocontractive operator.
Afuwape A. U.   +2 more
doaj   +1 more source

Coherent Frames [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2018
Frames which can be generated by the action of some operators (e.g. translation, dilation, modulation, ...) on a single element $f$ in a Hilbert space, called coherent frames.
Ataollah Askari Hemmat   +2 more
doaj   +1 more source

ON A GENERALIZATION OF THE HILBERT SPACE

open access: yesDemonstratio Mathematica, 1989
We give a certain generalization of Hilbert space using for this purpose the properties of the Mikusiński space and the space normed by elements belonging to the cone of the Mikusiński space. We give some examples of generalized unitary spaces and Hilbert spaces and applications of these spaces in the Bittner operational calculus.
openaire   +1 more source

Finite N Hilbert spaces of bilocal holography

open access: yesJournal of High Energy Physics
For vector/AdS and dS holography we establish the structure of the emergent Hilbert space. This is done through implementation of finite N trace relations on the infinite collective space.
Robert de Mello Koch   +2 more
doaj   +1 more source

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