Results 11 to 20 of about 5,016,292 (324)

New Theorems in Solving Families of Improper Integrals

open access: yesAxioms, 2022
Many improper integrals appear in the classical table of integrals by I. S. Gradshteyn and I. M. Ryzhik. It is a challenge for some researchers to determine the method in which these integrations are formed or solved. In this article, we present some new
Mohammad Abu Ghuwaleh   +2 more
doaj   +1 more source

A New Approach for Solving Nonlinear Fractional Ordinary Differential Equations

open access: yesMathematics, 2023
Recently, researchers have been interested in studying fractional differential equations and their solutions due to the wide range of their applications in many scientific fields.
Hassan Kamil Jassim   +1 more
doaj   +1 more source

Solving of some nonlinear ordinary differential equations in the form of power series

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022
In the current scientific literature, a variety of nonlinear ordinary differential equations are widely and successfully used to describe real processes in various fields of natural sciences: optics, elasticity theory, molecular physics, etc. For example,
I.N. Belyaeva   +2 more
doaj   +1 more source

The Efficient Techniques for Non-Linear Fractional View Analysis of the KdV Equation

open access: yesFrontiers in Physics, 2022
The solutions to fractional differentials equations are very difficult to investigate. In particular, the solutions of fractional partial differential equations are challenging tasks for mathematicians.
Hassan Khan   +9 more
doaj   +1 more source

Power Series Kernels [PDF]

open access: yesConstructive Approximation, 2008
Let \(\alpha\in\mathbb{N}_{0}^{d}\) and let \(w_{\alpha}\) be a positive real number such that \(\sum_{\alpha\in\mathbb{N}_{0}^{d}}\) \(\frac{w_{\alpha}}{(\alpha!)^{2}}\) \(
openaire   +2 more sources

New integral functions generated by rising factorial powers

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
We consider new nonelementary functions such as the Fresnel integrals, generated by rising factorial powers. Graphs of such functions are plotted and some of their properties are proved.
T.P. Goy, R.A. Zatorsky
doaj   +1 more source

Positivity in power series rings [PDF]

open access: yes, 2008
We extend and generalize the results of Scheiderer (2006) on the representation of polynomials nonnegative on two-dimensional basic closed semialgebraic sets.
Cimpric, Jaka   +2 more
core   +4 more sources

Irrational power series [PDF]

open access: yesProceedings of the American Mathematical Society, 1961
Here [x ] is the integer part of x. We write x = [x] + { x }, where x} is the fractional part of x. He has been good enough to let me see his manuscript and I am much obliged to him for this. His proof is very simple and really of an arithmetical nature.
openaire   +1 more source

PARAMETERS IDENTIFICATION OF THREE-PHASE TO CONTINUOUS CURRENT SYSTEMS DEVICES BY THE TIME SERIES METHOD

open access: yesNauka ta progres transportu, 2018
Purpose. The scientific work provides for the development and justification of a new method for the parametric identification of electric traction devices based on a system of orthogonal functions, namely – on the basis of time power series. Methodology.
T. M. Mishchenko
doaj   +1 more source

A New Electromagnetic Emission Source Frequency and Factor Identification Approach for Nonlinear Circuits From the Output Spectrum Data

open access: yesIEEE Access, 2020
For the practical nonlinear circuits, a number of new frequencies are generated in the output spectrum, which makes electromagnetic interference location quite challenging. To mitigate this problem, an approach is proposed to identify the electromagnetic
Donglin Su   +3 more
doaj   +1 more source

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