"无法用初等函数表示"
不等于"不可积"
所有,几乎处处连续函数 都 黎曼可积.
不好意思,正好看到,所以说一下.
平时这个版不太来..
We have not succeeded in answering all our problems.
The answers we have found only serve to raise a whole set
of new questions. In some ways we feel we are as confused
as ever, but we believe we are confused on a higher level
and about more important things.