在这份报纸，平常的微分方程的一个古典系统被造描述一种 n 维的量系统。吸收光谱和为系统的状态的密度从量看法和古典看法的点被定......

The Birkhoff systems are the generalization of the Hamiltonian systems.Generalized canonical transformations are studied......

The theory of time scales,which unifies continuous and discrete analysis,provides a powerful mathematical tool for the s......

This paper is devoted to discuss the motion of controllable constrained Birkhoffian system along with its absence of con......