Results 31 to 40 of about 119,617,328 (270)

Interpolation of Multiparameter Approximation Spaces

open access: yes, 2004
We prove a general interpolation theorem for linear operators acting simultaneously in several approximation spaces which are defined by multiparametric approximation families.
Asekritova, Irina,, Brudnyi, Yuri,
core   +1 more source

Faber-Schauder Wavelet Sparse Grid Approach for Option Pricing with Transactions Cost

open access: yesAbstract and Applied Analysis, 2014
Transforming the nonlinear Black-Scholes equation into the diffusion PDE by introducing the log transform of S and (T−t)→τ can provide the most stable platform within which option prices can be evaluated.
Shu-Li Mei
doaj   +1 more source

Mathematical Modeling of COVID-19 Transmission Using a Fractional Order Derivative

open access: yesFractal and Fractional, 2022
In this article, the mathematical model of COVID-19 is analyzed in the sense of a fractional order Caputo operator with the consideration of an asymptomatic class. The suggested model is comprised of four compartments. The results from fixed point theory
Badr S. Alkahtani
doaj   +1 more source

A Finite Difference Scheme for Compressible Miscible Displacement Flow in Porous Media on Grids with Local Refinement in Time

open access: yesAbstract and Applied Analysis, 2013
Considering two-dimensional compressible miscible displacement flow in porous media, finite difference schemes on grids with local refinement in time are constructed and studied.
Wei Liu
doaj   +1 more source

Undamped Free Vibration Analysis of Functionally Graded Beams: A Dynamic Finite Element Approach

open access: yesApplied Mechanics, 2022
A Dynamic Finite Element (DFE) method for coupled axial–flexural undamped free vibration analysis of functionally graded beams is developed and subsequently used to investigate the system’s natural frequencies and mode shapes. The formulation is based on
Aaron Gee, Seyed M. Hashemi
doaj   +1 more source

Sparse interpolation and rational approximation

open access: yes, 2016
Sparse interpolation or exponential analysis, is widely used and in quite different applications and areas of science and engineering. Therefore researchers are often not aware of similar studies going on in another field.
Lee, Wen-shin   +3 more
core   +1 more source

APPROXIMATELY SINGULAR WAVELET

open access: yesСистемный анализ и прикладная информатика, 2018
The problem of approximation is relevant for most engineering applications. In this connection, the universal methods of approximation are of interest. The method of nonparametric approximation is developing in the paper – the method of singular wavelets.
V. M. Romanchak
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

open access: yesFEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell   +2 more
wiley   +1 more source

Exponentiation of parametric Hamiltonians via unitary interpolation

open access: yesPhysical Review Research
The effort to generate matrix exponentials and associated differentials, required to determine the time evolution of quantum systems, frequently constrains the evaluation of problems in quantum control theory, variational circuit compilation, or Monte ...
Michael Schilling   +4 more
doaj   +1 more source

Integrated cosine functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
In order to the second order Cauchy problem (CP2):x″(t)=Ax(t), x(0)=x∈D(An), x″(0)=y∈D(Am) on a Banach space, Arendt and Kellermann recently introduced the integrated cosine function.
Quan Zheng
doaj   +1 more source

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