exact differential

Sufficient conditions that guaranteed the existence of periodic solutions for this problem were obtained by the method of pairing exact differential equation.

利用周期解配成恰当微分方程产生法,给出一类泛函微分方程周期解存在的充分条件,并利用分步求解法给出了相应的周期解表达式。

In this paper, extension form of the classical convention corresponding to the proper order of Maxwell s equations is given and accordingly the electromagnetic field is reduced to solution for two scalar functions.

给出了与Ｍａｘｗｅｌｌ方程组恰当阶次对应的经典规范的推广形式，使电磁场的求解归结为两个标量函数的求解。