Elliptic curve isogeny class with Cremona label 120b (LMFDB label 120.a)

• Label: 120b
• Number of curves: $4$
• Conductor: $120$
• CM: no
• Rank: $0$

Elliptic curves in class 120b

LMFDB label	Cremona label	Weierstrass coefficients	j-invariant	Discriminant	Torsion structure	Modular degree	Faltings height	Optimality
120.a4	120b1	\([0, 1, 0, 4, 0]\)	\(21296/15\)	\(-3840\)	\([2]\)	\(8\)	\(-0.62374\)	\(\Gamma_0(N)\)-optimal
120.a3	120b2	\([0, 1, 0, -16, -16]\)	\(470596/225\)	\(230400\)	\([2, 2]\)	\(16\)	\(-0.27717\)
120.a1	120b3	\([0, 1, 0, -216, -1296]\)	\(546718898/405\)	\(829440\)	\([2]\)	\(32\)	\(0.069403\)
120.a2	120b4	\([0, 1, 0, -136, 560]\)	\(136835858/1875\)	\(3840000\)	\([2]\)	\(32\)	\(0.069403\)

Rank

The elliptic curves in class 120b have rank \(0\).

Complex multiplication

The elliptic curves in class 120b do not have complex multiplication.

Modular form 120.2.a.b

Isogeny matrix

The \(i,j\) entry is the smallest degree of a cyclic isogeny between the \(i\)-th and \(j\)-th curve in the isogeny class, in the Cremona numbering.

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

Isogeny graph

The vertices are labelled with Cremona labels.