Cremona's table of elliptic curves
Conductor 20
20 = 2
2
· 5
Isogeny classes of curves of conductor 20
[newforms of level 20]
Class
r
Atkin-Lehner
Eigenvalues
20a
(4 curves)
0
2
-
5
+
2
-
-2
5
+
2
0
2
-6
-4
Curve
Equation
t
20a1
[0,1,0,4,4]
6
20a2
[0,1,0,-1,0]
6
20a3
[0,1,0,-36,-140]
2
20a4
[0,1,0,-41,-116]
2
Data from
Elliptic Curve Data
by J. E. Cremona.
Design inspired by
The Modular Forms Explorer
by William Stein.
Part of
Computational Number Theory
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