Elliptic curve isogeny class 254.2-a over number field \(\Q(\sqrt{2}) \)

• Base field: \(\Q(\sqrt{2}) \)
• Label: 2.2.8.1-254.2-a
• Conductor: 254.2
• Rank: \( 0 \)

Base field \(\Q(\sqrt{2}) \)

Generator \(a\), with minimal polynomial \( x^{2} - 2 \); class number \(1\).

Rank

Rank: \( 0 \)

Isogeny matrix

\(\left(\begin{array}{rrrr} 1 & 3 & 6 & 2 \\ 3 & 1 & 2 & 6 \\ 6 & 2 & 1 & 3 \\ 2 & 6 & 3 & 1 \end{array}\right)\)

Isogeny graph

Elliptic curves in class 254.2-a over \(\Q(\sqrt{2}) \)

Isogeny class 254.2-a contains 4 curves linked by isogenies of degrees dividing 6.

Curve label	Weierstrass Coefficients
254.2-a1	\( \bigl[1\) , \( -a - 1\) , \( 1\) , \( -1\) , \( a + 1\bigr] \)
254.2-a2	\( \bigl[1\) , \( -a - 1\) , \( 1\) , \( 20 a - 11\) , \( 25 a - 67\bigr] \)
254.2-a3	\( \bigl[1\) , \( -a - 1\) , \( 1\) , \( -15 a - 61\) , \( -5 a - 107\bigr] \)
254.2-a4	\( \bigl[1\) , \( -a - 1\) , \( 1\) , \( -10 a - 21\) , \( 37 a + 57\bigr] \)