"Good mathematics" could refer (in no particular order) to
...... Elegant mathematics (e.g. Paul Erdos's concept of "proofs from the Book" achieving a difficult result with a minimum of effort);
Terry Tao in What is Good Mathematics

我很早就听说过这本书，但真正引起我的兴趣是在看到那个Sylvester-Gallai定理的证明之后。
Sylvester-Gallai定理：平面上不全共线的个点，必有一条直线恰过其中两个点。

这个定...