tailieunhanh - Báo cáo hóa học: " On nonlocal three-point boundary value problems of Duffing equation with mixed nonlinear forcing terms"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : On nonlocal three-point boundary value problems of Duffing equation with mixed nonlinear forcing terms | Alsaedi and Aqlan Boundary Value Problems 2011 2011 47 http content 2011 1 47 o Boundary Value Problems a SpringerOpen Journal RESEARCH Open Access On nonlocal three-point boundary value problems of Duffing equation with mixed nonlinear forcing terms Ahmed Alsaedi and Mohammed HA Aqlan Correspondence aalsaedi@ Department of Mathematics Faculty of Science King Abdulaziz University . Box. 80203 Jeddah 21589 Saudi Arabia Springer Abstract In this paper we investigate the existence and approximation of the solutions of a nonlinear nonlocal three-point boundary value problem involving the forced Duffing equation with mixed nonlinearities. Our main tool of the study is the generalized quasilinearization method due to Lakshmikantham. Some illustrative examples are also presented. Mathematics Subject Classification 2000 34B10 34B15. Keywords Duffing equation nonlocal boundary value problem quasilinearization quadratic convergence 1 Introduction The Duffing equation plays an important role in the study of mechanical systems. There are multiple forms of the Duffing equation ranging from dampening to forcing terms. This equation possesses the qualities of a simple harmonic oscillator a nonlinear oscillator and has indeed an ability to exhibit chaotic behavior. Chaos can be defined as disorder and confusion. In physics chaos is defined as behavior so unpredictable as to appear random allowing great sensitivity to small initial conditions. The chaotic behavior can emerge in a system as simple as the logistic map. In that case the route to chaos is called period-doubling. In practice one would like to understand the route to chaos in systems described by partial differential equations such as flow in a randomly stirred fluid. This is however very complicated and difficult to treat either analytically or numerically. The Duffing equation is found to be an appropriate candidate for describing chaos in dynamic systems. The advantage of a

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