Isogeny class 31.2-a contains
6 curves linked by isogenies of
degrees dividing 8.
| Curve label |
Weierstrass Coefficients |
| 31.2-a1
| \( \bigl[a + 1\) , \( a^{3} - 3 a\) , \( a^{2} - 1\) , \( -15 a^{3} - 85 a^{2} + 385 a - 331\) , \( 187 a^{3} - 1626 a^{2} + 3723 a - 2518\bigr] \)
|
| 31.2-a2
| \( \bigl[a + 1\) , \( a^{3} - 3 a\) , \( a^{2} - 1\) , \( 270 a^{3} - 70 a^{2} - 655 a - 231\) , \( -2943 a^{3} + 1542 a^{2} + 6186 a + 1507\bigr] \)
|
| 31.2-a3
| \( \bigl[a + 1\) , \( a^{3} - 3 a\) , \( a^{2} - 1\) , \( 15 a^{3} - 5 a^{2} - 25 a - 31\) , \( -47 a^{3} + 4 a^{2} + 161 a - 22\bigr] \)
|
| 31.2-a4
| \( \bigl[a + 1\) , \( a^{3} - 3 a\) , \( a^{2} - 1\) , \( -5 a^{2} + 20 a - 21\) , \( -21 a^{2} + 62 a - 44\bigr] \)
|
| 31.2-a5
| \( \bigl[a + 1\) , \( a^{3} - 3 a\) , \( a^{2} - 1\) , \( -1\) , \( -a^{2} + 2 a - 1\bigr] \)
|
| 31.2-a6
| \( \bigl[a + 1\) , \( a^{3} - 3 a\) , \( a^{2} - 1\) , \( 60 a^{2} - 115 a + 9\) , \( -59 a^{3} - 14 a^{2} + 312 a - 163\bigr] \)
|
Rank: \( 0 \)
\(\left(\begin{array}{rrrrrr}
1 & 8 & 4 & 2 & 4 & 8 \\
8 & 1 & 2 & 4 & 8 & 4 \\
4 & 2 & 1 & 2 & 4 & 2 \\
2 & 4 & 2 & 1 & 2 & 4 \\
4 & 8 & 4 & 2 & 1 & 8 \\
8 & 4 & 2 & 4 & 8 & 1
\end{array}\right)\)
