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一、题目 A lattice point (x, y) in the first quadrant (x and y are integers greater than or equal to 0), other than the origin, is visible from the origin 阅读全文
posted @ 2018-10-06 17:20
Dybala21
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一、题目 The Farey Sequence Fn for any integer n with n >= 2 is the set of irreducible rational numbers a/b with 0 < a < b <= n and gcd(a,b) = 1 arranged 阅读全文
posted @ 2018-10-06 16:38
Dybala21
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一、题目 We say that integer x, 0 < x < p, is a primitive root modulo odd prime p if and only if the set { (x i mod p) | 1 <= i <= p-1 } is equal to { 1, 阅读全文
posted @ 2018-10-06 16:03
Dybala21
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一、题目 Given n, a positive integer, how many positive integers less than n are relatively prime to n? Two integers a and b are relatively prime if there 阅读全文
posted @ 2018-10-06 15:06
Dybala21
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一、引文 1.欧拉函数：指不超过n且与n互素的正整数的个数，其中，n是一个正整数。 二、相关知识 1.算数函数：定义在所有正整数上的函数称为算数函数。 2.乘性函数（积性函数）：对算数函数ƒ 如果满足对任意两个互素的正整数n和m，均有ƒ(nm)=ƒ(n)ƒ(m)。 3.完全乘性函数（完全积性函数）: 阅读全文
posted @ 2018-10-06 12:03
Dybala21
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