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Journal of the American Mathematical Society
Journal of the American Mathematical Society
ISSN 1088-6834(online) ISSN 0894-0347(print)

 

Low-lying zeros of families of elliptic curves


Author: Matthew P. Young
Journal: J. Amer. Math. Soc. 19 (2006), 205-250
MSC (2000): Primary 11M41, 11F30, 11G05, 11G40, 11L20, 11L40
Published electronically: September 7, 2005
MathSciNet review: 2169047
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Abstract: There is a growing body of work giving strong evidence that zeros of families of $L$-functions follow distribution laws of eigenvalues of random matrices. This philosophy is known as the random matrix model or the Katz-Sarnak philosophy. The random matrix model makes predictions for the average distribution of zeros near the central point for families of $L$-functions. We study these low-lying zeros for families of elliptic curve $L$-functions. For these $L$-functions there is special arithmetic interest in any zeros at the central point (by the conjecture of Birch and Swinnerton-Dyer and the impressive partial results towards resolving the conjecture).

We calculate the density of the low-lying zeros for various families of elliptic curves. Our main foci are the family of all elliptic curves and a large family with positive rank. An important challenge has been to obtain results with test functions that are concentrated close to the origin since the central point is a location of great arithmetical interest. An application of our results is an improvement on the upper bound of the average rank of the family of all elliptic curves (conditional on the Generalized Riemann Hypothesis (GRH)). The upper bound obtained is less than $2$, which shows that a positive proportion of curves in the family have algebraic rank equal to analytic rank and finite Tate-Shafarevich group. We show that there is an extra contribution to the density of the low-lying zeros from the family with positive rank (presumably from the ``extra" zero at the central point).


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Additional Information

Matthew P. Young
Affiliation: American Institute of Mathematics, 360 Portage Avenue, Palo Alto, California 94306-2244
Email: myoung@aimath.org

DOI: http://dx.doi.org/10.1090/S0894-0347-05-00503-5
PII: S 0894-0347(05)00503-5
Received by editor(s): April 6, 2005
Published electronically: September 7, 2005
Article copyright: © Copyright 2005 American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication.