Hostname: page-component-76fb5796d-vfjqv Total loading time: 0 Render date: 2024-04-26T09:49:41.547Z Has data issue: false hasContentIssue false

An asymptotic for the average number of amicable pairs for elliptic curves

Published online by Cambridge University Press:  26 October 2017

JAMES PARKS*
Affiliation:
Department of Mathematics and Computer Science, University of Lethbridge, 4401 University Drive, Lethbridge, AB, T1K 3M4, Canada.

Abstract

Amicable pairs for a fixed elliptic curve defined over ℚ were first considered by Silverman and Stange where they conjectured an order of magnitude for the function that counts such amicable pairs. This was later refined by Jones to give a precise asymptotic constant. The author previously proved an upper bound for the average number of amicable pairs over the family of all elliptic curves. In this paper we improve this result to an asymptotic for the average number of amicable pairs for a family of elliptic curves.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

with an appendix by Sumit Giri

Present address: Institut für Algebra, Zahlentheorie und Diskrete Mathematik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany e-mail: james.william.a.parks@gmail.com

This work was supported by a Pacific Institute for the Mathematical Sciences Postdoctoral Fellowship.

References

REFERENCES

[CDKS] Chandee, V., David, C., Koukoulopoulos, D. and Smith, E. The frequency of elliptic curves over prime finite fields. Canad. J. Math. 68 (2016), no. 4, 721761.Google Scholar
[Da] Davenport, H. Multiplicative Number Theory. Third edition. Revised and with a preface by Montgomery, Hugh L. Graduate Texts in Mathematics, 74 (Springer–Verlag, New York, 2000).Google Scholar
[DKS] David, C., Koukoulopoulos, D. and Smith, E. Sums of Euler products and statistics of elliptic curves. Math. Ann. 368 (2017), no. 1–2, 685752.Google Scholar
[DP] David, C. and Pappalardi, F. Average Frobenius distributions of elliptic curves. Internat. Math. Res. Notices (1999), no. 4, 165183.Google Scholar
[DS1] David, C. and Smith, E. Elliptic curves with a given number of points over finite fields. Compositio Math. 149 (2013), no. 2, 175203.Google Scholar
[DS2] David, C. and Smith, E. Corrigendum to: Elliptic curves with a given number of points over finite fields. Compositio Math. 150 (2014), no. 8, 13471348.Google Scholar
[De] Deuring, M. Die Typen der Multiplikatorenringe elliptischer Funktionenkörper. Abh. Math. Sem. Univ. Hamburg, 14 (1941), no. 1, 197272.Google Scholar
[E] Elliott, P. On the size of L(1, χ), J. Reine Angew. Math. 236 (1969), 2636.Google Scholar
[FM] Fouvry, E. and Murty, M. R. On the distribution of supersingular primes. Canad. J. Math. 48 (1996), no. 1, 81104.Google Scholar
[G] Gekeler, E. Frobenius distributions of elliptic curves over finite prime fields. Int. Math. Res. Not. (2003), no. 37, 19992018.Google Scholar
[GS] Granville, A. and Soundararajan, K. The distribution of values of L(1, χd). Geom. Funct. Anal. 13 (2003), no. 5, 9921028.Google Scholar
[J] Jones, N. Elliptic aliquot cycles of fixed length. Pacific J. Math. 263 (2013), no. 2, 353371.Google Scholar
[K] Koukoulopoulos, D. Primes in short arithmetic progressions. Int. J. Number Theory 11 (2015), no. 5, 14991521.Google Scholar
[LT] Lang, S. and Trotter, H. Frobenius distributions in GL2-extensions. Lecture Notes in Math. vol. 504 (Springer–Verlag, Berlin–New York, 1976).Google Scholar
[L] Lenstra, H. Factoring integers with elliptic curves. Ann. of Math. (2) 126 (1987), no. 3, 649673.Google Scholar
[P] Parks, J. Amicable pairs and aliquot cycles on average. Int. J. Number Theory 11 (2015), no. 6, 17511790.Google Scholar
[Se] Serre, J-P. Propriétés galoisiennes des points d'ordre fini des courbes elliptiques, Invent. Math. 15 (1972), 259331.Google Scholar
[Si] Silverman, J. The arithmetic of elliptic curves. Graduate Texts in Math., 106, (Springer–Verlag, New York, 1986).Google Scholar
[SS] Silverman, J. and Stange, K. Amicable pairs and aliquot cycles for elliptic curves. Exp. Math. 20 (2011), no. 3, 329357.Google Scholar
[Sm] Smyth, C. The terms in Lucas sequences divisible by their indices. J. Integer Seq. 13 (2010), no. 2, Article 10.2.4, 18 pp.Google Scholar