Properties

Base field \(\Q(\sqrt{5}, \sqrt{13})\)
Label 4.4.4225.1-36.4-a
Conductor 36.4
Rank \( 1 \)

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Base field \(\Q(\sqrt{5}, \sqrt{13})\)

Generator \(a\), with minimal polynomial \( x^{4} - 9 x^{2} + 4 \); class number \(1\).

Elliptic curves in class 36.4-a over \(\Q(\sqrt{5}, \sqrt{13})\)

Isogeny class 36.4-a contains 4 curves linked by isogenies of degrees dividing 6.

Curve label Weierstrass Coefficients
36.4-a1 \( \bigl[\frac{1}{4} a^{3} - \frac{7}{4} a - \frac{1}{2}\) , \( \frac{1}{4} a^{3} + \frac{1}{2} a^{2} - \frac{13}{4} a - \frac{3}{2}\) , \( -\frac{1}{4} a^{3} + \frac{1}{2} a^{2} + \frac{9}{4} a - \frac{3}{2}\) , \( -2 a^{3} - \frac{7}{2} a^{2} + \frac{5}{2} a + 3\) , \( \frac{9}{2} a^{3} + \frac{29}{2} a^{2} - a - 8\bigr] \)
36.4-a2 \( \bigl[1\) , \( \frac{1}{2} a^{2} - \frac{1}{2} a - 2\) , \( a + 1\) , \( -\frac{5}{2} a^{3} + \frac{5}{2} a^{2} + 20 a - 19\) , \( \frac{29}{4} a^{3} - 5 a^{2} - \frac{251}{4} a + \frac{83}{2}\bigr] \)
36.4-a3 \( \bigl[-\frac{1}{4} a^{3} + \frac{11}{4} a + \frac{3}{2}\) , \( \frac{1}{2} a^{2} - \frac{1}{2} a - 2\) , \( -\frac{1}{4} a^{3} + \frac{11}{4} a + \frac{1}{2}\) , \( \frac{19}{4} a^{3} - 2 a^{2} - \frac{165}{4} a + \frac{39}{2}\) , \( \frac{7}{2} a^{3} - \frac{5}{2} a^{2} - 30 a + 22\bigr] \)
36.4-a4 \( \bigl[\frac{1}{2} a^{2} + \frac{1}{2} a - 2\) , \( -\frac{1}{2} a^{2} - \frac{1}{2} a + 3\) , \( \frac{1}{2} a^{2} + \frac{1}{2} a - 2\) , \( -\frac{1}{2} a^{3} - \frac{3}{2} a^{2} + 3 a + 6\) , \( \frac{1}{4} a^{3} - \frac{11}{4} a - \frac{1}{2}\bigr] \)

Rank

Rank: \( 1 \)

Isogeny matrix

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

Isogeny graph