【摘要】 给出了带强迫项的二阶非线性微分方程x″(t)+p(t)f(x(t),x(τ(t)))g(x′(t))=e(t)振动的若干新的充分条件,改进并推广了孙元功(2003)的结果.更多还原

【Abstract】 Some new sufficient conditions are given for the oscillation of the forced second-order nonlinear differential equations of the formx″(t)+p(t)f(x(t),x(τ(t)))g(x′(t))=e(t).Our methodology is somewhat different from that of previous authors.Our results generalize and extend some earlier results of Sun Yuangong(2003).更多还原