Forgot password?
 Register account
View 226|Reply 2

[几何] $y^2+y=x^3-x$ mod p有奇点,则p=37

[Copy link]

3153

Threads

7905

Posts

610K

Credits

Credits
64091
QQ

Show all posts

hbghlyj Posted 2025-1-22 17:41 |Read mode
p为素数,若曲线$E: y^2+y=x^3-x$ 在mod p有奇点,则p=37

3153

Threads

7905

Posts

610K

Credits

Credits
64091
QQ

Show all posts

 Author| hbghlyj Posted 2025-1-22 17:43
Mathematica验证:
  1. Solve[y^2 + y - x^3 + x == D[y^2 + y - x^3 + x, x] == D[y^2 + y - x^3 + x, y] == 0, {x, y}, Modulus -> 37]
Copy the Code
(x,y)=(5,18)是奇点

具体是如何得到的呢

3153

Threads

7905

Posts

610K

Credits

Credits
64091
QQ

Show all posts

 Author| hbghlyj Posted 2025-1-22 18:12
Sage验证:
  1. E = EllipticCurve([0,0,1,-1,0])
  2. disc = E.discriminant()
  3. print(disc)
Copy the Code
37

具体是如何得到的呢

Mobile version|Discuz Math Forum

2025-6-5 07:49 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit