The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
一个好的数学问题的定义是它产生的数学,而不是问题本身。
We are communal histories, communal books. We are not owned or monogamous in our taste or experience.
你脑袋里有大脑,鞋子里有双脚,你可以选择任何方向前进。
我从未见过一个我不试图用机械方法解决的问题。
The key ingredients of happiness could not be material or aesthetic, but must always stubbornly psychological.