Properties

Base field \(\Q(\sqrt{65}) \)
Label 2.2.65.1-81.1-b
Conductor 81.1
Rank \( 2 \)

Related objects

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Base field \(\Q(\sqrt{65}) \)

Generator \(a\), with minimal polynomial \( x^{2} - x - 16 \); class number \(2\).

Elliptic curves in class 81.1-b over \(\Q(\sqrt{65}) \)

Isogeny class 81.1-b contains 6 curves linked by isogenies of degrees dividing 8.

Curve label Weierstrass Coefficients
81.1-b1 \( \bigl[a\) , \( -a - 1\) , \( 0\) , \( -105705 a - 373248\) , \( 46089086 a + 162746508\bigr] \)
81.1-b2 \( \bigl[1\) , \( -1\) , \( 1\) , \( 197367 a + 696928\) , \( 150097888 a + 530014986\bigr] \)
81.1-b3 \( \bigl[a\) , \( -a - 1\) , \( 0\) , \( -7425 a - 26208\) , \( 563828 a + 1990956\bigr] \)
81.1-b4 \( \bigl[1\) , \( -1\) , \( 1\) , \( -2319 a - 8189\) , \( -113648 a - 401306\bigr] \)
81.1-b5 \( \bigl[a\) , \( -a - 1\) , \( 0\) , \( -112230 a - 396288\) , \( 41102447 a + 145138044\bigr] \)
81.1-b6 \( \bigl[a\) , \( -a - 1\) , \( 0\) , \( -1795635 a - 6340608\) , \( 2629919444 a + 9286584492\bigr] \)

Rank

Rank: \( 2 \)

Isogeny matrix

\(\left(\begin{array}{rrrrrr} 1 & 8 & 4 & 8 & 2 & 4 \\ 8 & 1 & 2 & 4 & 4 & 8 \\ 4 & 2 & 1 & 2 & 2 & 4 \\ 8 & 4 & 2 & 1 & 4 & 8 \\ 2 & 4 & 2 & 4 & 1 & 2 \\ 4 & 8 & 4 & 8 & 2 & 1 \end{array}\right)\)

Isogeny graph