Existence of positive periodic solutions of neutral nonlinear differential systems with variable delays

OMA-Vol. 3 (2019), Issue 2, pp. 19 – 31 Open Access Full-Text PDF
Hocine Gabsi, Abdelouaheb Ardjouni, Ahcene Djoudi
Abstract: By using some mixed techniques of the Mawhin coincidence degree theory and the Krasnoselskii fixed point theorem, we obtained the existence of positive periodic solutions of the neutral nonlinear differential system. Also, sufficient conditions for the existence of positive periodic solutions to the system with feedback control are given. Our results substantially extend and improve existing results.
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Exponentiated transmuted lindley distribution with applications

OMA-Vol. 3 (2019), Issue 2, pp. 1 – 18 Open Access Full-Text PDF
Emmanuel W. Okereke
Abstract: In this paper, we study a new distribution called the exponentiated transmuted Lindley distribution. The proposed distribution has three special cases namely Lindley, exponentiated Lindley and transmuted Lindley distributions. Along with the basic properties of the distribution, the maximum likelihood technique of estimating the parameters of the distribution are discussed. Two applications of the distribution are also part of this article.
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