复杂性理论告诉我们,并非所有问题都是平等的;有些问题本质上比其他问题更难。
I think that one should recognize reality even when one doesn’t like it; indeed, especially when one doesn’t like it.
A arte é a expressão mais pura da alma humana.
The beauty of mathematics only shows itself to more patient followers.
The way a child holds a book tells you everything about how they feel about it.