"Complexity theory teaches us that not all problems are created equal; some are inherently harder than others."
世界上最昂贵的东西是信任。赢得信任可能需要数年,而失去它可能只需要几秒钟。
Time is a material like any other, and it's one I work with constantly.
In mathematics, you don't understand things. You just get used to them.