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hbghlyj 发表于 2024-11-5 12:08 $p$ 为素数, $d$ 是 $p-1$ 的正因子, $(a, p)=1$, 若 $x^d-a \equiv 0(\bmod p)$ 有解, 则在模 $p$ 意义下恰有 $d$ 个解。
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2025-7-21 15:43 GMT+8
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