Comparison theorem for oscillation of fourth-order nonlinear retarded dynamic equations

Chenghui Zhang, Ravi Agarwal, Tongxing Li
2013 Electronic Journal of Qualitative Theory of Differential Equations  
This work is concerned with oscillation of a class of fourth-order nonlinear delay dynamic equations on a time scale. A new comparison theorem is established that improves related results reported in the literature. 1991 Mathematics Subject Classification. 34K11, 34N05, 39A10.
doi:10.14232/ejqtde.2013.1.22 fatcat:rnnjwexatvgnnmvfolgwym6a64