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pro vyhledávání: '"Mohamad A. M. Alwash"'
Autor:
Mohamad A. M. Alwash
Publikováno v:
Electronic Journal of Differential Equations, Vol 2005, Iss 84, Pp 1-8 (2005)
We present some results on the number of periodic solutions for scalar non-autonomous polynomial equations of degree five. We also consider a class of polynomial equations of any degree. Our results give upper bounds for the number of limit cycles of
Externí odkaz:
https://doaj.org/article/1464e72a1fa14a06b8adadc5d3fd0740
Autor:
Mohamad A. M. Alwash
Publikováno v:
Electronic Journal of Differential Equations, Vol 2003, Iss 69, Pp 1-4 (2003)
We describe a class of polynomials that satisfy the composition conjecture for the moments. We also show that the composition conjecture for the moments is not weaker than the composition conjecture for a center. The problem is related to the centers
Externí odkaz:
https://doaj.org/article/34f20d3824ab42fc812a735c6a417421
Autor:
Mohamad Ali M. Alwash
Publikováno v:
Electronic Journal of Differential Equations, Vol 2007, Iss 101, Pp 1-15 (2007)
We present some results on the existence and nonexistence of centers for polynomial first order ordinary differential equations with complex coefficients. In particular, we show that binomial differential equations without linear terms do not have co
Externí odkaz:
https://doaj.org/article/dbbf608d7e464210935d9a9e963538be