proofs by contradiction造句

例句与造句

1. then . with the help of some good results of differential equations theory, some sufficient conditions for all solutions of the equations to be oscillatory are obtained . the way is to proof by contradiction and construct sequence
   1)的振动性，首先，利用积分变换，给出了几个引理，将此类差分方程转化为相应的微分方程或微分不等式，得出了新变量的一些重要性质；然后用反证法和构造序列的方法，充分利用微分方程理论中的一些重要结论，得到此类差分方程解振动的若干充分条件
2. It's difficult to find proofs by contradiction in a sentence. 用proofs by contradiction造句挺难的