Tables of elliptic curves of given rank#
The default database of curves contains the following data:
Rank |
Number of curves |
Maximal conductor |
---|---|---|
0 |
30427 |
9999 |
1 |
31871 |
9999 |
2 |
2388 |
9999 |
3 |
836 |
119888 |
4 |
10 |
1175648 |
5 |
5 |
37396136 |
6 |
5 |
6663562874 |
7 |
5 |
896913586322 |
8 |
6 |
457532830151317 |
9 |
7 |
~9.612839e+21 |
10 |
6 |
~1.971057e+21 |
11 |
6 |
~1.803406e+24 |
12 |
1 |
~2.696017e+29 |
14 |
1 |
~3.627533e+37 |
15 |
1 |
~1.640078e+56 |
17 |
1 |
~2.750021e+56 |
19 |
1 |
~1.373776e+65 |
20 |
1 |
~7.381324e+73 |
21 |
1 |
~2.611208e+85 |
22 |
1 |
~2.272064e+79 |
23 |
1 |
~1.139647e+89 |
24 |
1 |
~3.257638e+95 |
28 |
1 |
~3.455601e+141 |
Note that lists for r>=4 are not exhaustive; there may well be curves of the given rank with conductor less than the listed maximal conductor, which are not included in the tables.
AUTHORS: - William Stein (2007-10-07): initial version - Simon Spicer (2014-10-24): Added examples of more high-rank curves
See also the functions cremona_curves() and cremona_optimal_curves() which enable easy looping through the Cremona elliptic curve database.
- class sage.schemes.elliptic_curves.ec_database.EllipticCurves#
Bases:
object
- rank(rank, tors=0, n=10, labels=False)#
Return a list of at most \(n\) curves with given rank and torsion order.
INPUT:
rank
(int) – the desired ranktors
(int, default 0) – the desired torsion order (ignored if 0)n
(int, default 10) – the maximum number of curves returned.labels
(bool, default False) – if True, return Cremona labels instead of curves.
OUTPUT:
(list) A list at most \(n\) of elliptic curves of required rank.
EXAMPLES:
sage: elliptic_curves.rank(n=5, rank=3, tors=2, labels=True) ['59450i1', '59450i2', '61376c1', '61376c2', '65481c1']
sage: elliptic_curves.rank(n=5, rank=0, tors=5, labels=True) ['11a1', '11a3', '38b1', '50b1', '50b2']
sage: elliptic_curves.rank(n=5, rank=1, tors=7, labels=True) ['574i1', '4730k1', '6378c1']
sage: e = elliptic_curves.rank(6)[0]; e.ainvs(), e.conductor() ((1, 1, 0, -2582, 48720), 5187563742) sage: e = elliptic_curves.rank(7)[0]; e.ainvs(), e.conductor() ((0, 0, 0, -10012, 346900), 382623908456) sage: e = elliptic_curves.rank(8)[0]; e.ainvs(), e.conductor() ((1, -1, 0, -106384, 13075804), 249649566346838)
For large conductors, the labels are not known:
sage: L = elliptic_curves.rank(6, n=3); L [Elliptic Curve defined by y^2 + x*y = x^3 + x^2 - 2582*x + 48720 over Rational Field, Elliptic Curve defined by y^2 + y = x^3 - 7077*x + 235516 over Rational Field, Elliptic Curve defined by y^2 + x*y = x^3 - x^2 - 2326*x + 43456 over Rational Field] sage: L[0].cremona_label() Traceback (most recent call last): ... LookupError: Cremona database does not contain entry for Elliptic Curve defined by y^2 + x*y = x^3 + x^2 - 2582*x + 48720 over Rational Field sage: elliptic_curves.rank(6, n=3, labels=True) []