【摘要】 利用M aw h in重合度拓展定理,研究了一类时滞Du ffing型方程x″+β(t)g(x(t-τ))=p(t)周期解存在性,其中β(t)不变号.更多还原

【Abstract】 By employing the continuation theorem of coincidence degree theory developed by Mawhin,we study a knid of Duffing equation with a deviating argument as follows x(″t)+β(t)g(x(t-τ))=p(t).When the sign of β(t) is invariable,the equation has periodic solutions.更多还原