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关于丢番图方程x~4-Dy~2=1(Ⅱ)

ON THE DIOPHANTINE EQUATION x~4-Dy~2≡1(II)

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【作者】 柯召; 孙琦;

【Author】 KO CEAO Sun Chi (S. Chuan University)

【机构】 四川大学; 四川大学;

【摘要】 <正> 关于丢番图方程 x~4ーDy~2=1,D>0且不是平方数。 (1)Ljunggren,Cohn和本文作者都有过不少工作,现简述如下: 1.1942年,Ljunggren证明了丢番图方程(1)最多只有二组正整数解(x,y). 2.1966年,Ljunggren还证明了D=p是一个奇素数时,则方程(1)在p≠5,29

【Abstract】 For the Diophantine equation x4 - Dy2 = 1, (1) where D>O and is not a perfect square, we prove the following theorems in this paper.Theorem 1. If D7 (mod 8), D= P1p2…P3, s≥2, where pi (i=1,…, s) are distinct primes, p1≡1 (mod 4) such that either 2p1=a2+b2, a≡±3 (mod 8), b≡±3 (mod 8)or there is a j(2≤j≤s), for which Legendre symbal (pi/p1)=-1, and pi≡7 (mod 8) (i=2,…, s) or pi≡3 (mod 8) (i=2,…, s), then (1) has no solutions in positive integer x, y.Theorem 2. If D=p1…ps, s≥2, where pi(i=1,…, s) are distinct primes, and pi≡3 (mod 4) (i=1,…, s), then (1) has no solutions in positive integer x, y.Theorem 3. The equation (1) with D=2p1…p3 has no solutions in positive integer x, y, if(1) p1≡(mod 4),pi≡7 (mod 8) (i=2,…, s), such that either 2p1=a2+b2, a≡±3(mod 8), b≡±3 (mod 8) or there is a j(2≤j≤s) for which(pi/p1)=-1; or (2) p1≡5 (mod 8), pi≡3 (mod 8) (i=2,…, s); or (3) p1≡5 (mod 8), pi≡7 (mod 8) (i=2,…, s).Corollary of theorem 3. If D=2pq, p≡5 (mod 8), q≡3 (mod 4), where p, q are distinct primes, then (1) has no solutions in positive integer x, y.Theorem 4. If D=2p1…ps,pi≡3 (mod 4) (i=1, …, s), then (1) has no solutions in positive integer x, y.

  • 【文献出处】 数学年刊A辑(中文版) ,Chinese Annals of Mathematics,series A , 编辑部邮箱 ,1980年01期
  • 【被引频次】8
  • 【下载频次】76
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