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Properties

Base field \(\Q(\sqrt{57}) \)
Label 2.2.57.1-256.1-r
Number of curves 4
Graph
Conductor 256.1
Rank \( 0 \)

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Base field \(\Q(\sqrt{57}) \)

Copy content comment:Define the base number field
 
Copy content sage:R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([-14, -1, 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 \( x^{2} - x - 14 \); class number \(1\).

Copy content comment:Define the isogeny class
 
Copy content sage:E = EllipticCurve([K([0,0]),K([1,1]),K([0,0]),K([-4884238,1142337]),K([-5517144100,1290582430])]) 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 256.1-r have rank \( 0 \).

Isogeny matrix

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

\(\left(\begin{array}{rrrr} 1 & 3 & 7 & 21 \\ 3 & 1 & 21 & 7 \\ 7 & 21 & 1 & 3 \\ 21 & 7 & 3 & 1 \end{array}\right)\)

Isogeny graph

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

Elliptic curves in class 256.1-r over \(\Q(\sqrt{57}) \)

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

Isogeny class 256.1-r contains 4 curves linked by isogenies of degrees dividing 21.

Curve label Weierstrass Coefficients
256.1-r1 \( \bigl[0\) , \( a + 1\) , \( 0\) , \( 1142337 a - 4884238\) , \( 1290582430 a - 5517144100\bigr] \)
256.1-r2 \( \bigl[0\) , \( -a - 1\) , \( 0\) , \( -1142335 a - 3741902\) , \( -1289440094 a - 4222819768\bigr] \)
256.1-r3 \( \bigl[0\) , \( a + 1\) , \( 0\) , \( -3423 a + 14642\) , \( -190018 a + 812316\bigr] \)
256.1-r4 \( \bigl[0\) , \( -a - 1\) , \( 0\) , \( 3425 a + 11218\) , \( 186594 a + 611080\bigr] \)