Results 1 to 10 of about 275,134 (139)

Modified Hilbert Curve for Rectangles and Cuboids and Its Application in Entropy Coding for Image and Video Compression

open access: yesEntropy, 2021
In our previous work, by combining the Hilbert scan with the symbol grouping method, efficient run-length-based entropy coding was developed, and high-efficiency image compression algorithms based on the entropy coding were obtained.
Yibiao Rong, Xia Zhang, Jianyu Lin
doaj   +1 more source

On the Kolyvagin's formula, the Tate pairing associated to an isogeny, the local Artin map and the Hilberts symbol

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
A proof of nondegeneracy of the Tate pairing and Kolyvagin's formula for elliptic curves with good reductions over an $n$-dimensional $(n\leq 3)$ pseudolocal field, the Tate pairing associated to an isogeny between abelian varieties over pseudolocal ...
V.I. Nesteruk
doaj   +3 more sources

Chaos for the Dynamics of Toeplitz Operators

open access: yesMathematics, 2022
Chaotic properties in the dynamics of Toeplitz operators on the Hardy–Hilbert space H2(D) are studied. Based on previous results of Shkarin and Baranov and Lishanskii, a characterization of different versions of chaos formulated in terms of the ...
Salud Bartoll   +3 more
doaj   +1 more source

A Logically Formalized Axiomatic Epistemology System Σ + C and Philosophical Grounding Mathematics as a Self-Sufficing System

open access: yesMathematics, 2021
The subject matter of this research is Kant’s apriorism underlying Hilbert’s formalism in the philosophical grounding of mathematics as a self-sufficing system.
Vladimir Olegovich Lobovikov
doaj   +1 more source

Increasing the symbol rate in QAM system using a new set of orthonormal basics functions

open access: yesJournal of Electrical Systems and Information Technology, 2018
This paper proposes a new technique to increase the symbol rate in Quadrature Amplitude Modulation (QAM) using a new set of orthonormal functions. The proposed technique increases the rate of QAM symbols without increasing the bandwidth of the modulated ...
A.Y. Hassan
doaj   +1 more source

Equivalence of the Symbol Grounding and Quantum System Identification Problems

open access: yesInformation, 2014
The symbol grounding problem is the problem of specifying a semantics for the representations employed by a physical symbol system in a way that is neither circular nor regressive.
Chris Fields
doaj   +1 more source

Invertible and normal composition operators on the Hilbert Hardy space of a half–plane

open access: yesConcrete Operators, 2016
Operators on function spaces of form Cɸf = f ∘ ɸ, where ɸ is a fixed map are called composition operators with symbol ɸ. We study such operators acting on the Hilbert Hardy space over the right half-plane and characterize the situations when they are ...
Matache Valentin
doaj   +1 more source

Hyponormality on a Weighted Bergman Space

open access: yesJournal of Function Spaces, 2020
A bounded Hilbert space operator T is hyponormal if T∗T−TT∗ is a positive operator. We consider the hyponormality of Toeplitz operators on a weighted Bergman space.
Houcine Sadraoui   +3 more
doaj   +1 more source

Emergent parallel transport and curvature in Hermitian and non-Hermitian quantum mechanics [PDF]

open access: yesQuantum
Studies have shown that the Hilbert spaces of non-Hermitian systems require nontrivial metrics. Here, we demonstrate how evolution dimensions, in addition to time, can emerge naturally from a geometric formalism.
Chia-Yi Ju   +4 more
doaj   +1 more source

On Determinant Expansions for Hankel Operators

open access: yesConcrete Operators, 2020
Let w be a semiclassical weight that is generic in Magnus’s sense, and (pn)n=0∞({p_n})_{n = 0}^\infty the corresponding sequence of orthogonal polynomials. We express the Christoffel–Darboux kernel as a sum of products of Hankel integral operators.
Blower Gordon, Chen Yang
doaj   +1 more source

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