%0 Journal Article %T A Note on the Existence of Periodic Solutions of Second Order Non-Linear Differential Equations %J American Journal of Mathematics and Statistics %@ 2162-8475 %D 2012 %I %R 10.5923/j.ajms.20120202.04 %X Bahman Mehri, using Leray ¨C Schauder fixed point continuation method, established the existence of periodic solutions to equations of the form,x// +( k+h(x)) x/ + f(t, x) = p(t),where h is a continuous function, f, p are continuous functions in their respective arguments and periodic with respect to t of period ¦Ø and k is a constant.The aim of this research is to extend this result to a wider class of equations of the form, x// +( k+h(x)) x/ + F(t, x, x/) = p(t),where F is continuous in t,x and x/; and periodic with respect to t of period ¦Ø and k is a constant, using Leray-Schauder fixed point continuation method. %K Nonlinear Equation %K Sublinear Equation %K Periodic Solutions %K Fixed Points %K Leray ¨C Schauder %K Continuation method %K Boundedness of Solutions and Continuous Functions %U http://article.sapub.org/10.5923.j.ajms.20120202.04.html