Prime-counting function
- 素数计数函数（在数学中，素数计数函数是一个用来表示小于或等于某个实数x的素数的个数的函数，记为）
Prime-counting function
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abstract:
In mathematics, the prime-counting function is the function counting the number of prime numbers less than or equal to some real number x. It is denoted by \scriptstyle\pi(x) (this does not refer to the number π).
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WordNet