We will give a short and elementary proof of the existence of infinitely many primes $p$ such that a given positive integer $a$ congruent 3 modulo 4 is a quadratic non-residue modulo $p$.
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机译:我们将给出一个简短的基本证明,证明存在无限多个素数$ p $,这样,给定的正整数$ a $一致3模4是二次非残数模$ p $。
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