Opened 6 years ago
Closed 6 years ago
#1120 closed enhancement (fixed)
[with patch] speed up point counting for elliptic curves over GF(p^n) if coefficients are in GF(p)
Reported by: | malb | Owned by: | was |
---|---|---|---|
Priority: | minor | Milestone: | sage-2.8.13 |
Component: | number theory | Keywords: | |
Cc: | Merged in: | ||
Authors: | Reviewers: | ||
Report Upstream: | Work issues: | ||
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
If possible #E is computed over the prime subfield now.
sage: EllipticCurve(GF(4,'a'),[1,2,3,4,5]).cardinality() 8 sage: k.<a> = GF(3^3) sage: l = [a^2 + 1, 2*a^2 + 2*a + 1, a^2 + a + 1, 2, 2*a] sage: EllipticCurve(k,l).cardinality() WARNING: Using very very stupid algorithm for counting points over non-prime finite field. Please rewrite. See the file ell_finite_field.py. 29 sage: l = [1, 1, 0, 2, 0] sage: EllipticCurve(k,l).cardinality() 38
Attachments (1)
Change History (4)
Changed 6 years ago by malb
comment:1 Changed 6 years ago by mabshoff
- Milestone changed from sage-2.9 to sage-2.8.13
comment:2 Changed 6 years ago by robertwb
comment:3 Changed 6 years ago by mabshoff
- Resolution set to fixed
- Status changed from new to closed
Merged in 2.8.13.alpha1
Applied with slight fuzz:
mabshoff@sage:$hg import ell_finite_field_order.patch applying ell_finite_field_order.patch patching file sage/schemes/elliptic_curves/ell_finite_field.py Hunk #4 succeeded at 330 with fuzz 1 (offset 0 lines).
Cheers,
Michael
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Works great for me.