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Torsion subgroups of elliptic curves in short Weierstrass form
Author(s):
Michael
A.
Bennett;
Patrick
Ingram
Journal:
Trans. Amer. Math. Soc.
357
(2005),
3325-3337.
MSC (2000):
Primary 11G05, 11J68
Posted:
March 10, 2005
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Abstract:
In a recent paper by M. Wieczorek, a claim is made regarding the possible rational torsion subgroups of elliptic curves in short Weierstrass form, subject to certain inequalities for their coefficients. We provide a series of counterexamples to this claim and explore a number of related results. In particular, we show that, for any , all but finitely many curves
where and are integers satisfying , have rational torsion subgroups of order either one or three. If we modify our demands upon the coefficients to , then the now have trivial rational torsion, with at most finitely many exceptions, at least under the assumption of the abc-conjecture of Masser and Oesterlé.
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Additional Information:
Michael
A.
Bennett
Affiliation:
Department of Mathematics, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
Patrick
Ingram
Affiliation:
Department of Mathematics, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
DOI:
10.1090/S0002-9947-05-03629-9
PII:
S 0002-9947(05)03629-9
Received by editor(s):
December 20, 2003
Received by editor(s) in revised form:
February 15, 2004
Posted:
March 10, 2005
Copyright of article:
Copyright
2005,
American Mathematical Society
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