数学大师希尔伯特曾讲过这样一段话:“在讨论数学问题时,我相信特殊化比一般化起着更为重要的作用.我们寻找一个答案而未能成功的原因,就在于这样的事实,即有一些比手头的问题更简单、更容易的问题没有完全解决,这一切都有赖于找出这些比较容 Mathematical guru Hilbert once said something like this: ”When discussing mathematical problems, I believe that specialization plays a more important role than generalization. The reason why we find an answer and fail to do so is that The fact that there are some simpler and easier problems than those at hand is not completely solved and all depends on finding these more tolerable