Some delta-nabla type maximum principles for second-order dynamic equations on time scales are proved. By using these maximum principles, the uniqueness theorems of the solutions, the approximation theorems of the solutions, the existence theorem, and construction techniques of the lower and upper solutions for second-order linear and nonlinear initial value problems and boundary value problems on time scales are proved, the oscillation of second-order mixed delat-nabla differential equations is discussed and, some maximum principles for second order mixed forward and backward difference dynamic system are proved.
Jiang Zhu. Dongmei Liu. "Delta-Nabla Type Maximum Principles for Second-Order Dynamic Equations on Time Scales and Applications." Abstr. Appl. Anal. 2014 (SI13) 1 - 28, 2014. https://doi.org/10.1155/2014/165429