The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
我,相信一个人不管是怎样的脾气,都免不了有某种短处,这是一种天生的缺陷,即使受教育受得再好,也还是克服不了。
To solve a problem, you have to be willing to think differently.
拓扑绝缘体的美在于它们的鲁棒性;它们的表面态受到保护,不受无序和缺陷的影响。
I accept chaos, I'm not sure whether it accepts me.