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Properties

Base field \(\Q(\sqrt{-61}) \)
Label 2.0.244.1-72.1-a
Number of curves 6
Graph
Conductor 72.1
Rank \( 0 \)

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Base field \(\Q(\sqrt{-61}) \)

Copy content comment:Define the base number field
 
Copy content sage:R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([61, 0, 1]))
 
Copy content pari:K = nfinit(Polrev(%s));
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R!%s);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(Qx(%s))
 

Generator \(a\), with minimal polynomial \( x^{2} + 61 \); class number \(6\).

Copy content comment:Define the isogeny class
 
Copy content sage:E = EllipticCurve([K([0,0]),K([-1,0]),K([0,0]),K([16,0]),K([-180,0])]) E.isogeny_class()
 

Rank

Copy content comment:Compute the Mordell-Weil rank
 
Copy content sage:E.rank()
 
Copy content magma:Rank(E);
 

The elliptic curves in class 72.1-a have rank \( 0 \).

Isogeny matrix

Copy content comment:Isogeny matrix
 
Copy content sage:E.isogeny_class().matrix()
 

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

Isogeny graph

Copy content comment:Isogeny graph
 
Copy content sage:E.isogeny_class().graph().plot(edge_labels=True)
 

Elliptic curves in class 72.1-a over \(\Q(\sqrt{-61}) \)

Copy content comment:List of curves in the isogeny class
 
Copy content sage:E.isogeny_class().curves
 

Isogeny class 72.1-a contains 6 curves linked by isogenies of degrees dividing 8.

Curve label Weierstrass Coefficients
72.1-a1 \( \bigl[0\) , \( -1\) , \( 0\) , \( 16\) , \( -180\bigr] \)
72.1-a2 \( \bigl[0\) , \( -1\) , \( 0\) , \( 1\) , \( 0\bigr] \)
72.1-a3 \( \bigl[0\) , \( -1\) , \( 0\) , \( -4\) , \( 4\bigr] \)
72.1-a4 \( \bigl[0\) , \( -1\) , \( 0\) , \( -24\) , \( -36\bigr] \)
72.1-a5 \( \bigl[0\) , \( -1\) , \( 0\) , \( -64\) , \( 220\bigr] \)
72.1-a6 \( \bigl[0\) , \( -1\) , \( 0\) , \( -384\) , \( -2772\bigr] \)