Results 31 to 40 of about 220,114 (306)

New modification of the Post Widder operators preserving exponential functions

open access: yesArab Journal of Basic and Applied Sciences
The current article deals with a modification of the Post-Widder operators which reproduce the exponential functions both [Formula: see text] and [Formula: see text] for [Formula: see text] The central moments, uniform convergence of the operators and ...
Melek Sofyalıoğlu Aksoy
doaj   +1 more source

The $C^*$-algebra of the exponential function [PDF]

open access: yesProceedings of the American Mathematical Society, 2013
The complex exponential function is a local homeomorphism and gives therefore rise to an 'etale groupoid and a C*-algebra. We determine this algebra, as well as the alge bra of the complex conjugate of the exponential function.
openaire   +4 more sources

Approximating trigonometric functions by using exponential inequalities

open access: yesJournal of Inequalities and Applications, 2019
In this paper, some exponential inequalities are derived from the inequalities containing trigonometric functions. Numerical examples show that one can achieve much tighter bounds than those of prevailing methods, which are presented by Cusa, Huygens ...
Xiao-Diao Chen, Junyi Ma, Yixin Li
doaj   +1 more source

Advanced-Level Students’ Understanding of Exponential Equations: A Zimbabwean Case Study

open access: yesMEJ (Mathematics Education Journal), 2023
This paper reports on a study which explored high school students’ conceptual understanding of the techniques of exponential functions. Thirty-one advanced-level students participated in the study.
Lillias, Hamufari, Natsai Mutambara   +1 more
doaj   +1 more source

On-Line Analysis of Exponential Time Functions

open access: yesMeasurement + Control, 1972
A hybrid computer configuration has been devised for the fast on-line estimation of the parameters of a second order exponential time function. Experimental results are given for a range of time constant ratios and the effect of signal noise is ...
J O Gray, J P Palmer
doaj   +1 more source

Generalised Exponential Families and Associated Entropy Functions

open access: yesEntropy, 2008
A generalised notion of exponential families is introduced. It is based on the variational principle, borrowed from statistical physics. It is shown that inequivalent generalised entropy functions lead to distinct generalised exponential families.
Jan Naudts
doaj   +1 more source

Pre-functions and Extended pre-functions of Complex Variables

open access: yesJournal of Nigerian Society of Physical Sciences, 2023
Pre-functions are functions that possess a sequence $\{f_{n}(z,\beta)\}$ which tends to one of the elementary functions as $n$ tends to infinity and $\beta$ tends to 0.
Thirumalai A, Muthunagai K, Ritu Agarwal
doaj   +1 more source

Fractional Exponential Function and Its Application

open access: yes, 2022
: In this paper, we obtain the limit representation of fractional exponential function. The application of fractional exponential function is illustrated.
Chii-Huei Yu
core   +1 more source

A Novel Fourth-Order Finite Difference Scheme for European Option Pricing in the Time-Fractional Black–Scholes Model

open access: yesMathematics
This paper addresses the valuation of European options, which involves the complex and unpredictable dynamics of fractal market fluctuations. These are modeled using the α-order time-fractional Black–Scholes equation, where the Caputo fractional ...
Xin Cai, Yihong Wang
doaj   +1 more source

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