12. p = 3 or 1 + 3n () p = X2
+ 3Y2
p = 3 or p ⌘ 1 (mod 3)
13. p = 7 or 1, 2, 4 + 7n () p = X2
+ 7Y2
p = 7 or p ⌘ 1, 2, 4 (mod 7)
14. まとめると
p = 7 or 1, 2, 4 + 7n () p = X2
+ 7Y2
p = 2 or 1 + 4n () p = X2
+ Y2
p = 3 or 1 + 3n () p = X2
+ 3Y2
p = 7 or p ⌘ 1, 2, 4 (mod 7)
p = 3 or p ⌘ 1 (mod 3)
p = 2 or p ⌘ 1 (mod 4)
52. Q(ζm)
K
Q
{ 1(mod m) }
(Z/mZ)×
H
mod m で
分解法則が決まる
p 2 H () p
ガロア群
体の塔 mod m の群の塔
53. Q(ζ7)
Q(√-7)
Q
{ 1(mod 7) }
(Z/7Z)x
{1, 2, 4(mod 7)}
p 2 H () p
ガロア群
体の塔 mod 7 の群の塔
「Q(√-7) における素数の分解法則」
54. まとめると
p = 7 or 1, 2, 4 + 7n () p = X2
+ 7Y2
p = 2 or 1 + 4n () p = X2
+ Y2
p = 3 or 1 + 3n () p = X2
+ 3Y2
p = 7 or p ⌘ 1, 2, 4 (mod 7)
p = 3 or p ⌘ 1 (mod 3)
p = 2 or p ⌘ 1 (mod 4)
79. まとめ
p = 7 or 1, 2, 4 + 7n () p = X2
+ 7Y2
p = 2 or 1 + 4n () p = X2
+ Y2
p = 3 or 1 + 3n () p = X2
+ 3Y2
p = 7 or p ⌘ 1, 2, 4 (mod 7)
p = 3 or p ⌘ 1 (mod 3)
p = 2 or p ⌘ 1 (mod 4)
80.
81. •
• POD
•
•
•
• D. Cox Primes of the Form: x2+ny2 (2nd edition)