Elliptic curve isogeny class 900.2-t over number field \(\Q(\sqrt{21}) \)

• Base field: \(\Q(\sqrt{21}) \)
• Label: 2.2.21.1-900.2-t
• Conductor: 900.2
• Rank: \( 0 \)

Base field \(\Q(\sqrt{21}) \)

Generator \(a\), with minimal polynomial \( x^{2} - x - 5 \); class number \(1\).

Rank

Rank: \( 0 \)

Isogeny matrix

\(\left(\begin{array}{rr} 1 & 5 \\ 5 & 1 \end{array}\right)\)

Isogeny graph

Elliptic curves in class 900.2-t over \(\Q(\sqrt{21}) \)

Isogeny class 900.2-t contains 2 curves linked by isogenies of degree 5.

Curve label	Weierstrass Coefficients
900.2-t1	\( \bigl[1\) , \( -a + 1\) , \( a + 1\) , \( 12 a - 48\) , \( -43 a + 121\bigr] \)
900.2-t2	\( \bigl[1\) , \( -a + 1\) , \( a + 1\) , \( -1158 a - 2163\) , \( 38522 a + 47731\bigr] \)