Results 91 to 100 of about 2,105 (196)

Trigonometric polynomial high order neural network group models for financial data simulation and prediction

open access: yes, 1998
This thesis investigates a new method for financial data simulation using novel neural network models developed by the author. Using two improved models for financial data simulation and prediction, the trigonometric polynomial higher order neural ...
Zhang, Jing Chun
core  

From Quantum AN to E8 Trigonometric Model: Space-of-Orbits View

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2013
A number of affine-Weyl-invariant integrable and exactly-solvable quantum models with trigonometric potentials is considered in the space of invariants (the space of orbits).
Alexander V. Turbiner
doaj   +1 more source

A Class of Sheffer Sequences of Some Complex Polynomials and Their Degenerate Types

open access: yesMathematics, 2019
We study some properties of Sheffer sequences for some special polynomials with complex Changhee and Daehee polynomials introducing their complex versions of the polynomials and splitting them into real and imaginary parts using trigonometric polynomial ...
Dojin Kim
doaj   +1 more source

On Hyponormal Toeplitz Operators With Trigonometric Polynomial Symbols

open access: yes, 2005
In this thesis, we study the form of Schur's function Φ₃(c_(0), c₁, c₂, c₃). By using the Schur's function, we ?nd some necessary and su±cient conditions for hyponormality of Toeplitz operator T_(f) , where f(z)=a₄z⁴+bar{∑⁴_(j=0)b_(j ...
徐智賢
core  

Fast Trigonometric Polynomial Approach for Computing the Shape from Shading

open access: yes, 2008
Several recently developed techniques for recons-truction surface shape from shading information estimate surface slopes with out ensuring that they integrable.
Y. M. Fouda   +2 more
core  

Some Identities and Inequalities for Derivatives

open access: yes, 1995
We introduce some identities for the derivative of a trigonometric polynomial which are obtained from the identity of Riesz. We then use these new identities to derive some inequalities for derivatives of trigonometric and algebraic polynomials.
Kilgore, T., Balazs, K.
core   +1 more source

Deterministic sampling of sparse trigonometric polynomials

open access: yesJournal of Complexity, 2011
One can recover sparse multivariate trigonometric polynomials from few randomly taken samples with high probability (as shown by Kunis and Rauhut). We give a deterministic sampling of multivariate trigonometric polynomials inspired by Weil's exponential sum.
openaire   +3 more sources

Cubature formula for trigonometric polynomial of type of part on octahedron

open access: yes, 2019
Всеукраїнська науково-практична конференціяУ роботі побудовано інтерполяційну кубатурну формулу по області октаедра з шістьма вузлами інтерполяції, яка є точною для тригонометричних поліномів окремого виду.
Мотайло А.П.   +3 more
core  

On the detection of singularities of a periodic function

open access: yes, 2000
We discuss the problem of detecting the location of discontinuities of derivatives of a periodic function, given either finitely many Fourier coefficients of the function, or the samples of the function at uniform or scattered data points.
J. Prestin   +3 more
core   +1 more source

Block band Toeplitz preconditioners derived from generating function approximations: Analysis and applications

open access: yes, 2006
We are concerned with the study and the design of optimal preconditioners for ill-conditioned Toeplitz systems that arise from a priori known real-valued nonnegative generating functions f(x,y) having roots of even multiplicities.
Noutsos, D.   +2 more
core   +1 more source

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