Results 61 to 70 of about 22,208 (203)

Linear Chebyshev Approximation of Complex-Valued Functions [PDF]

Mathematics of Computation, 1978
This paper is concerned with Chebyshev approximation by linear functions to complex-valued data. The problem is nonlinear, and we present a convergent algorithm for its solution. We also pose a related linear problem which is simple to solve, and which produces approximations which are near-best in the Chebyshev sense within a factor of
Barrodale, I., Delves, L. M., Mason, J. C.   +2 more
openaire   +2 more sources

Image and video analysis using graph neural network for Internet of Medical Things and computer vision applications

CAAI Transactions on Intelligence Technology, EarlyView.
Abstract Graph neural networks (GNNs) have revolutionised the processing of information by facilitating the transmission of messages between graph nodes. Graph neural networks operate on graph‐structured data, which makes them suitable for a wide variety of computer vision problems, such as link prediction, node classification, and graph classification.
Amit Sharma, Ashutosh Sharma, Alexey Tselykh, Alexander Bozhenyuk, Byung‐Gyu Kim   +4 more
wiley   +1 more source

Schur convexity properties of the weighted arithmetic integral mean and Chebyshev functional

Journal of Numerical Analysis and Approximation Theory, 2013
In this paper, we discuss the Schur convexity, Schur geometrical convexity and Schur harmonic convexity of the weighted arithmetic integral mean and Chebyshev functional.
Long Bo-Yong, Jiang Yue-Ping, Chu Yu-Ming   +2 more
doaj   +2 more sources

Bivariate Chebyshev Type Inequalities for Alpha Diamond Integrals via Time Scale Calculus

Journal of Mathematics
In this article, some generalizations of inequalities involving Chebyshev functional depending upon two parameters, for the class of twice differentiable functions on time scales, are studied.
Khaled Aldwoah, Ammara Nosheen, Faez A. Alqarni, Khuram Ali Khan, Masud Ahmad, Rostin M. Mabela   +5 more
doaj   +1 more source

On the weighted fractional Pólya–Szegö and Chebyshev-types integral inequalities concerning another function

Advances in Difference Equations, 2020
The primary objective of this present paper is to establish certain new weighted fractional Pólya–Szegö and Chebyshev type integral inequalities by employing the generalized weighted fractional integral involving another function Ψ in the kernel.
Kottakkaran Sooppy Nisar, Gauhar Rahman, Dumitru Baleanu, Muhammad Samraiz, Sajid Iqbal   +4 more
doaj   +1 more source

Systematic Errors in Future Weak Lensing Surveys: Requirements and Prospects for Self-Calibration

, 2005
We study the impact of systematic errors on planned weak lensing surveys and compute the requirements on their contributions so that they are not a dominant source of the cosmological parameter error budget.
B. Jain, D. Huterer, G. Bernstein, Jain, Linder, M. Takada   +5 more
core   +1 more source

Bivariate Chebyshev polynomials of the fifth kind for variable-order time-fractional partial integro-differential equations with weakly singular kernel

Advances in Difference Equations, 2021
The shifted Chebyshev polynomials of the fifth kind (SCPFK) and the collocation method are employed to achieve approximate solutions of a category of the functional equations, namely variable-order time-fractional weakly singular partial integro ...
Khadijeh Sadri, Kamyar Hosseini, Dumitru Baleanu, Ali Ahmadian, Soheil Salahshour   +4 more
doaj   +1 more source

A conjecture implying the existence of non-convex Chebyshev sets in infinite-dimensional Hilbert spaces [PDF]

, 2010
In this paper, we propose the study of a conjecture whose affirmative solution would provide an example of a non-convex Chebyshev set in an infinite-dimensional real Hilbert ...
Ricceri, Biagio
core   +3 more sources

Hyperelliptic Theta-Functions and Spectral Methods: KdV and KP solutions

, 2005
This is the second in a series of papers on the numerical treatment of hyperelliptic theta-functions with spectral methods. A code for the numerical evaluation of solutions to the Ernst equation on hyperelliptic surfaces of genus 2 is extended to ...
A. Bobenko, B. Deconinck, B. Fornberg, B.A. Dubrovin, C. Klein, C. Klein, C.L. Tretkoff, D. Korotkin, D. Mumford, E.D. Belokolos, F.J. Ernst, J. Frauendiener, J. Frauendiener, J.D. Fay, M. Hoeij, M. Seppälä, P. Gianni, S. Novikov   +17 more
core   +1 more source

Chebyshev Approximations for the Riemann Zeta Function [PDF]

Mathematics of Computation, 1971
This paper presents well-conditioned rational Chebyshev approximations, involving at most one exponentiation, for computation of eitherζ(s)\zeta (s)orζ(s)−1,.5≦s≦55\zeta (s) - 1,.5 \leqq s \leqq 55, for up to 20 significant figures. The logarithmic error is required in one case.
Cody, W. J., Hillstrom, K. E., Thacher, Henry C. jun.   +2 more
openaire   +1 more source