Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Rizgar H. Salih"'
Autor:
Tahsin I. Rasul, Rizgar H. Salih
Publikováno v:
Baghdad Science Journal, Vol 21, Iss 7 (2024)
This paper is devoted to investigating the Hopf bifurcation of a three-dimensional quadratic jerk system. The stability of the singular points, the appearance of the Hopf bifurcation and the limit cycles of the system are studied. Additionally, the L
Externí odkaz:
https://doaj.org/article/148cd45b657947d892bcebf854fec870
Autor:
Ali A. Shukur, Rizgar H. Salih
Publikováno v:
Franklin Open, Vol 4, Iss , Pp 100040- (2023)
The complex dynamics of a newly proposed 4D hyperchaotic Lorenz-type system are studied in this paper. The sufficient conditions for the emergence and stability of periodic solutions at bifurcation points are derived using averaging theory. The ultim
Externí odkaz:
https://doaj.org/article/e39e0722be2d4bc88ab8ae254c4768e7
Autor:
Rizgar H. Salih, Bashdar M. Mohammed
Publikováno v:
Zanco Journal of Pure and Applied Sciences, Vol 34, Iss s6 (2022)
This paper is devoted to studying the stability of the unique equilibrium point and the occurrence of the Hopf bifurcation as well as limit cycles of a three-dimensional chaotic system. We characterize the parameters for which a Hopf equilibrium poin
Externí odkaz:
https://doaj.org/article/1379cd9979d74e71925addaaf67a7de6
Publikováno v:
Zanco Journal of Pure and Applied Sciences, Vol 32, Iss 2 (2020)
This article is devoted to study the bifurcated periodic orbits from centre for a differential equation of third order. Sufficient conditions for the existence of a centre are obtained by using inverse Jacobi multiplier. As a result, we found four se
Externí odkaz:
https://doaj.org/article/6e7a10f94c3a469d8832ae8e06e22c7e
Autor:
Rizgar H. Salih
Publikováno v:
Kirkuk Journal of Science, Vol 6, Iss 2, Pp 184-200 (2011)
In this work, we study new system with a rich structure (the Shimizu-Morioka system), which is exhibiting the Lorenz-like dynamics. Where the dot denotes the system obtained a Hopf bifurcation (Supercritical and subcritical) for some values of . For
Externí odkaz:
https://doaj.org/article/c14daa19e4bf480fae4bfd4ad92f3e64
Publikováno v:
Mathematical Modelling of Natural Phenomena
Nowadays, there are a variety of descriptive studies of available clinical data for coronavirus disease (COVID-19). Mathematical modelling and computational simulations are effective tools that help global efforts to estimate key transmission paramet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a62635479d7839b6b94656a3a8fa40b
Autor:
Mohammad Hasso, Rizgar H. Salih
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2017, Iss 19, Pp 1-10 (2017)
In this paper, the bifurcated limit cycles from centre for a special three dimensional quadratic polynomial system and the Lü system are studied. For a given centre, the cyclicity is bounded from below by considering the linear parts of the correspo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d52d169bc1def2599452aa6cf7439900
http://www.math.u-szeged.hu/ejqtde/periodica.html?periodica=1¶mtipus_ertek=publication¶m_ertek=5425
http://www.math.u-szeged.hu/ejqtde/periodica.html?periodica=1¶mtipus_ertek=publication¶m_ertek=5425
Publikováno v:
Open Journal of Modelling and Simulation. :32-46
Calculating analytical approximate solutions for non-linear infectious disease models is a difficult task. Such models often require computational tools to analyse analytical approximate methods which appear in some theoretical and practical applicat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93fce9772d6ae87b0329f48d873bcb83
https://doi.org/10.4236/ojmsi.2017.51003
https://doi.org/10.4236/ojmsi.2017.51003
Autor:
Rizgar H. Salih
Publikováno v:
AIP Conference Proceedings.
This paper is devoted to study the zero-Hopf bifurcation of the three dimensional Lotka-Volterra systems. The explicit conditions for the existence of two first integrals for the system and a line of singularities with zero eigenvalue are given. We c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c387b8d1f3fdd908ea1ca9e751891b05
https://doi.org/10.1063/1.5020487
https://doi.org/10.1063/1.5020487
Autor:
Azad Amen, Rizgar H. Salih
Publikováno v:
Al-Rafidain Journal of Computer Sciences and Mathematics, Vol 5, Iss 1, Pp 81-99 (2008)
We prove that near the bifurcation point unstable limit cycle arises from the Lorenz system. In the analysis, we use the method of local bifurcation theory, especially the center manifold and the normal form theorem. A computer algebra system using M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35c33ac8b5bc0591c6e51b81db0509d8
https://doi.org/10.33899/csmj.2008.163951
https://doi.org/10.33899/csmj.2008.163951