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Properties

Base field \(\Q(\sqrt{-87}) \)
Label 2.0.87.1-192.4-b
Number of curves 6
Graph
Conductor 192.4
Rank \( 0 \)

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Base field \(\Q(\sqrt{-87}) \)

Copy content comment:Define the base number field
 
Copy content sage:R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([22, -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 \( x^{2} - x + 22 \); class number \(6\).

Copy content comment:Define the isogeny class
 
Copy content sage:E = EllipticCurve([K([0,0]),K([0,0]),K([0,0]),K([141,0]),K([4718,0])]) 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 192.4-b 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 192.4-b over \(\Q(\sqrt{-87}) \)

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

Isogeny class 192.4-b contains 6 curves linked by isogenies of degrees dividing 8.

Curve label Weierstrass Coefficients
192.4-b1 \( \bigl[0\) , \( 0\) , \( 0\) , \( 141\) , \( 4718\bigr] \)
192.4-b2 \( \bigl[0\) , \( 0\) , \( 0\) , \( 6\) , \( -7\bigr] \)
192.4-b3 \( \bigl[0\) , \( 0\) , \( 0\) , \( -39\) , \( -70\bigr] \)
192.4-b4 \( \bigl[0\) , \( 0\) , \( 0\) , \( -219\) , \( 1190\bigr] \)
192.4-b5 \( \bigl[0\) , \( 0\) , \( 0\) , \( -579\) , \( -5362\bigr] \)
192.4-b6 \( \bigl[0\) , \( 0\) , \( 0\) , \( -3459\) , \( 78302\bigr] \)