在高等数学界，多样性是个问题，这已经不是什么秘密了。
It's no secret in the advanced-math community that diversity is a problem.
第二类问题来自组合数学界。
The second class of problem comes from the world of combinatorics.
多少年过去，在世界数学界，他被称为数学之王。
How many years in the past, the world known, he was called the king of mathematics.
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