摘要
给出了四阶微分方程(r(t)x(t))"+f(t,x(g(t)))=0正解存在的两个充分条件.
Consider the four order differential equation(r(t)(t)) ″+ f(t,x(g(t)))=0,sufficient conditions are obtained for existence of positive solution of equation.
出处
《北华大学学报(自然科学版)》
CAS
2003年第1期1-4,共4页
Journal of Beihua University(Natural Science)
关键词
四阶微分方程
正解
存在性
充分条件
强超线性
强次线性
Four order differential equations
Existence of positive solution
Strong superlinear