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A Generalized Series Expansion of the Arctangent Function Based on the Enhanced Midpoint Integration

open access: yesAppliedMath, 2023
In this work, we derive a generalized series expansion of the acrtangent function by using the enhanced midpoint integration (EMI). Algorithmic implementation of the generalized series expansion utilizes a two-step iteration without surd or complex ...
Sanjar M. Abrarov   +3 more
doaj   +1 more source

An extensive note on various fractional-order type operators and some of their effects to certain holomorphic functions

open access: yesAnnales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2022
The aim of this paper is to present background information in relation with some fractional-order type operators in the complex plane, which is designed by the fractional-order derivative operator(s).
Hüseyin Irmak
doaj  

An approach for one dimensional periodic arbitrary lithography based on Fourier series

open access: yesEngineering Science and Technology, an International Journal, 2021
In interference lithography, 1-dimensional (1D) Fourier series expansion (FSE) technique can be used to create 1D periodic arbitrary patterns. Since the energy of electric field can change the solubility of photoresist, the required electric field ...
Mahdi Kordi   +3 more
doaj   +1 more source

Determination of the expansion capacity by calcination of the clays from San José de Cúcuta, Colombia

open access: yes, 2021
Viscoplasticity and pyroplasticity of clays are important characteristics to control in production processes of lightweight concrete aggregates. When clay is calcined under temperatures above 1,000 ℃, its volume increases.
Cáceres, J R   +2 more
core   +1 more source

Expansion of multiple series in infinite diagonals

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013
In this paper a method of summation of double absolutely convergent numerical series was obtained. This method was named the expansion of double numerical series in infinite diagonals.
Anton A Korneev, Olga A Doroshkevich
doaj   +1 more source

New BBP-Type Formulae for π Derived from New Forms of Taylor Expansions of Inverse Tangent Function

open access: yesMathematics, 2022
In this work, we give two new Taylor expansions of arctan(x + ω), where ω represents a finite increment of x. We discover several remarkable infinite series from these expansions by special substitutions.
Xin Wu, Zhongfan Chen, Yinan Zhu
doaj   +1 more source

Asymptotic expansion of a series of Ramanujan [PDF]

open access: yesProceedings of the Edinburgh Mathematical Society, 1992
An asymptotic expansion is given for the seriesas x→∞ in the sector |Argx|≦π/2–δ. Here δ, Re(a), and Re(s) are positive and r is a positive integer. In the case a = r = s = 1, this yields the nontrivial resultstated by Ramanujan in his notebooks [6].
Berndt, Bruce C., Evans, Ronald J.
openaire   +2 more sources

SERIES EXPANSIONS AND SUDDEN SINGULARITIES [PDF]

open access: yesThe Thirteenth Marcel Grossmann Meeting, 2015
We construct solutions of the Friedmann equations near a sudden singularity using generalized series expansions for the scale factor, the density, and the pressure of the fluid content. In this way, we are able to arrive at a solution with a sudden singularity containing two free constants, as required for a general solution of the cosmological ...
Barrow, John D.   +2 more
openaire   +2 more sources

The continued fraction expansion of certain Pierce series [PDF]

open access: yes, 2017
A Pierce series is an alternating sum of the reciprocals of an increasing sequence of positive integers, each one divisible by the previous one. In this short note we study some Pierce series that arise from certain continued fractions. Moreover, we show
Varona, J.L. [0000-0002-2023-9946]   +1 more
core   +1 more source

Power series expansions for spheroidal wave functions with small arguments

open access: yes, 2002
Power series expansions for the angular spheroidal wave functions of the first kind Smn(c,η), with small arguments c, are derived for general integer values of m and n.
Gerassimos C. Kokkorakis   +5 more
core   +1 more source

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