看了拯救孩子那个帖子给大家推荐一个网站

  • E
    Eurydice
    If you could be the Devil and offer a mathematician to sell his soul for the proof of one theorem - what theorem would most mathematicians ask for? I think it would be the Riemann Hypothesis.

  • D
    Dielew
    不错，收藏了
  • J
    Jonsoncao
    我顶
  • e
    easyrider
    很好，很内涵。收藏先
  • 任
    任黑
    支持！
  • 凶
    凶残的存在
    版主发的东西有深度呼？
    废话·～