Isogeny class 31.2-b contains
6 curves linked by isogenies of
degrees dividing 8.
| Curve label |
Weierstrass Coefficients |
| 31.2-b1
| \( \bigl[a^{3} - 2 a + 1\) , \( a^{3} - a^{2} - 2 a + 2\) , \( a^{2} - 1\) , \( 416 a^{3} + 76 a^{2} - 1585 a - 348\) , \( 6396 a^{3} + 1587 a^{2} - 23865 a - 5050\bigr] \)
|
| 31.2-b2
| \( \bigl[a^{3} - 2 a + 1\) , \( a^{3} - a^{2} - 2 a + 2\) , \( a^{2} - 1\) , \( -24 a^{3} - 4 a^{2} + 90 a - 63\) , \( 49 a^{3} + 26 a^{2} - 250 a + 169\bigr] \)
|
| 31.2-b3
| \( \bigl[a^{3} - 2 a + 1\) , \( a^{3} - a^{2} - 2 a + 2\) , \( a^{2} - 1\) , \( 26 a^{3} + 6 a^{2} - 100 a - 23\) , \( 93 a^{3} + 20 a^{2} - 358 a - 75\bigr] \)
|
| 31.2-b4
| \( \bigl[a^{3} - 2 a + 1\) , \( a^{3} - a^{2} - 2 a + 2\) , \( a^{2} - 1\) , \( 36 a^{3} + 16 a^{2} - 135 a - 18\) , \( 78 a^{3} - 11 a^{2} - 319 a - 36\bigr] \)
|
| 31.2-b5
| \( \bigl[a^{3} - 2 a + 1\) , \( a^{3} - a^{2} - 2 a + 2\) , \( a^{2} - 1\) , \( a^{3} + a^{2} - 5 a - 3\) , \( a^{3} + a^{2} - 6 a - 1\bigr] \)
|
| 31.2-b6
| \( \bigl[a^{3} - 2 a + 1\) , \( a^{3} - a^{2} - 2 a + 2\) , \( a^{2} - 1\) , \( a^{3} + a^{2} - 5 a + 2\) , \( a^{3} - 2 a\bigr] \)
|
Rank: \( 0 \)
\(\left(\begin{array}{rrrrrr}
1 & 8 & 2 & 4 & 4 & 8 \\
8 & 1 & 4 & 8 & 2 & 4 \\
2 & 4 & 1 & 2 & 2 & 4 \\
4 & 8 & 2 & 1 & 4 & 8 \\
4 & 2 & 2 & 4 & 1 & 2 \\
8 & 4 & 4 & 8 & 2 & 1
\end{array}\right)\)
