期刊名称:International Journal of Mathematics and Mathematical Sciences
印刷版ISSN:0161-1712
电子版ISSN:1687-0425
出版年度:1990
卷号:13
期号:1
页码:151-158
DOI:10.1155/S0161171290000205
出版社:Hindawi Publishing Corporation
摘要:
In this paper, we establish some strongly oscillation theorems for nonlinear second order functional differential equation x ″ ( t ) + p ( t ) f ( x ( t ) , x ( g ( t ) ) ) = 0 without assuming that g ( t ) is retarded or advanced.