The theorem proposed by the British mathematician J. Wilson (1741-93) states that "( p -1)!+1 is divisible by p if and only if p is a prime number." It was proved by J. Lagrange and L. Euler. This theorem is generally understood as follows: x p -1 -1≡( x -1)( x -2)…( x - p +1) (mod p ) In particular, when x = 0, that is, ( p -1)! ≡ -1 (mod p ) This is what is known as Wilson's theorem. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
イギリスの数学者 J.ウィルソン (1741~93) によって提出された,「 p が素数であるとき,かつそのときにのみ,(p-1)!+1 は p で割切れる」という定理。 J.ラグランジュや L.オイラーによって証明された。この定理は一般に, xp-1-1≡(x-1)(x-2)…(x-p+1) (modp) と書かれ,特に x=0 の場合,すなわち, (p-1)!≡-1 (modp) が,いわゆるウィルソンの定理である。 出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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