## Selected papers, preprints and talks

#### BibTeX entries

1. The L-functions and modular forms database project
Based on a plenary lecture given at FoCM'14, December 2014, Montevideo, Uruguay
ArXiv 1511.04289 (14 pages, November 2015)
2. Joint with Manjul Bhargava and Tom Fisher:
The proportion of plane cubic curves over $\mathbb{Q}$ that everywhere locally have a point
ArXiv 1311.5578 (13 pages, November 2013)
International Journal of Number Theory
DOI: 10.1142/S1793042116500664
3. Joint with Manjul Bhargava, Tom Fisher, Nick Jones and Jon Keating:
What is the probability that a random integral quadratic form in $n$ variables has an integral zero?
ArXiv 1502.05992 (17 pages, February 2015, supercedes ArXiv 1311.5543 (November 2013) which has been withdrawn)
IMRN (published online, 9 September 2015); full text; doi:10.1093/imrn/rnv251
4. Joint with Barinder Banwait:
Tetrahedral Elliptic Curves and the local-to-global principle for Isogenies
Algebra & Number Theory 8-5 (2014), 1201--1229. DOI 10.2140/ant.2014.8.1201
ArXiv 1305.6818 (23 pages, June 2013; revised August 2013 and May 2014)
Details of Sage computation of the three genus 3 modular curves of level 13.
BibTeX
5. Joint with M. T. Aranes:
Congruence subgroups, cusps and Manin symbols over number fields
pdf (19 pages, 2013-03-01)
"Computations with Modular Forms" Proceedings of the Summer School and Conference Heidelberg August/September 2011, eds. G. Boeckle, G. Wiese.
Springer 2014, Contributions in Mathematical and Computational Sciences Volume 6.
6. Joint with Tom Fisher, Catherine O'Neil, Denis Simon and Michael Stoll:
Explicit n-descent on elliptic curves III. Algorithms
ArXiv 1107.3516 (43 pages, revised August 2012)
Mathematics of Computation 84 No.292 (2015), 895-922 ( offprint )
BibTeX
7. Numerical evidence for the Birch Swinnerton-Dyer Conjecture:
slides for a talk given in Cambridge at the BSD 50th anniversary conference, May 2011.
8. Joint with Thotsaphon Thongjunthug:
The complex AGM, periods of elliptic curves over $\mathbb{C}$ and complex elliptic logarithms
arXiv:1011.0914v1 [math.NT]
The Journal of Number Theory Volume 133, Issue 8, August 2013, Pages 2813-2841
BibTeX
9. Joint with Tom Fisher and Michael Stoll:
Minimisation and reduction of 2-, 3- and 4-coverings of elliptic curves
ArXiV math.NT/0908.1741, 56 pages
Journal of Algebra & Number Theory 4 No.6 (2010), 763-820.
BibTeX
10. Joint with Andrew V. Sutherland:
On a theorem of Mestre and Schoof:
pdf (4 pages, 2008-12-31); arXiv:0901.0120v1 [math.NT]
Journal de Théorie des nombres de Bordeaux, Tome 22 No.2 (2010), pages 353-358.
BibTeX
11. Joint with Martin Edjvet:
Cyclically Presented Groups and Resultants
pdf (15 pages, 2010-03-13).
IJAC (International Journal of Algebra and Computation) 2010 Volume No.20, Issue No. 3, pp. 417-435 , DOI: 10.1142/S0218196710005777.
BibTeX
12. Reduction of binary forms over imaginary quadratic fields:
slides for a talk given in Bordeaux at the conference "Explicit Methods in Number Theory" in honour of Henri Cohen, October 2007.
13. Unimodular Integer Circulants: preprint, 14 pages (2007-02-28, minor corrections 2007-05-16, revision 2007-06-28, minor revision 2007-07-26)
Mathematics of Computation 77 (2008), 1639-1652.
BibTeX
14. Joint with Tom Fisher, Catherine O'Neil, Denis Simon and Michael Stoll:
Explicit n-descent on elliptic curves II. Geometry: ArXiv math.NT/0611606, 24 pages
Journal für die reine und angewandte Mathematik 632 (2009), 63--84
BibTeX
15. Joint with Tom Fisher:
On the equivalence of binary quartics: pdf, 13 pages (2008-11-13)
Journal of Symbolic Computation, 44 (2009) 673--682. DOI: doi:10.1016/j.jsc.2008.09.004
BibTeX
16. Computing in component groups of elliptic curves: preprint (pdf)
ANTS VIII Proceedings: A. van der Poorten, A. Stein (eds.), ANTS VIII, Lecture Notes in Computer Science 5011 (2008), pages 118-124.
Slides from the talk given at ANTS: pdf
BibTeX
17. Joint with Mark Lingham:
Finding all elliptic curves with good reduction outside a given set of primes: pdf, 15 pages (Revised 2006-12-14)
Experimental Mathematics 16 No.3 (2007), 303-312.
Slides for a talk
BibTeX
18. Joint with Tom Fisher, Catherine O'Neil, Denis Simon and Michael Stoll:
Explicit n-descent on elliptic curves I. Algebra: ArXiv math.NT/0606580, 37 pages
Journal für die reine und angewandte Mathematik, Vol. 615 (2008), 121-155.
BibTeX
19. Appendix to a paper by Amod Agashe, Ken Ribet and William Stein:
The Manin Constant
Pure and Applied Mathematics Quarterly, Vol. 2 no.2 (2006), pp. 617-636.
Preprint available here.
BibTeX
20. Joint with Samir Siksek:
Computing a Lower Bound for the Canonical Height on Elliptic Curves over Q: pdf [revised 2006-04-07].
ANTS VII Proceedings: F.Hess, S.Pauli and M.Pohst (eds.), ANTS VII, Lecture Notes in Computer Science 4076 (2006), pages 275-286.
BibTeX
21. The elliptic curve database for conductors to 130000:
ANTS VII Proceedings: F.Hess, S.Pauli and M.Pohst (eds.), ANTS VII, Lecture Notes in Computer Science 4076 (2006), pages 11-29.
Preprint (with some corrections)
Slides for talk, either with or without page pauses (with some corrections)
BibTeX
22. Joint with Mark van Hoeij:
Solving Conics over Function Fields: pdf (revised 21 July 2006).
Journal de Théorie des Nombres de Bordeaux 18(3) 2006, 595--606.
BibTeX
23. Joint with Martin Prickett and Samir Siksek:
Height Difference Bounds For Elliptic Curves over Number Fields: pdf.
Journal of Number Theory 116(1) (2006), 42-68. (Available from Science Direct)
BibTeX
24. Joint with Samir Siksek:
On the Diophantine Equation $x^2+7=y^m$: ps, pdf.
Acta Arithmetica 109.2 (2003), 143--149.
Slides for a talk on this.
BibTeX
25. Joint with Michael Stoll:
On the reduction theory of binary forms (20 pages): ps, pdf.
Journal für die reine und angewandte Mathematik 565 (2003), 79--99.
Slides for a talk on this.
BibTeX
26. Joint with Michael Stoll:
Minimal models for 2-coverings of Elliptic Curves:
BibTeX
27. On the computation of Mordell-Weil and 2-Selmer Groups of Elliptic Curves (11 pages): ps, pdf.
Rocky Mountain Journal of Mathematics (2002) vol. 32, no. 3, pp.953--967.
BibTeX
28. Review of Henri Cohen's Book "Advanced Topics in Computational Number Theory", for the LMS: ps, pdf.
29. Joint with Barry Mazur:
Visualizing elements in the Shafarevich-Tate group (20 pages): preprint in dvi, ps format (Abstract)
Experimental Mathematics 9:1 (2000), pages 13-28.
BibTeX
A. Agashe, W. Stein, J. Cremona, B. Mazur:
Visible evidence for the Birch and Swinnerton-Dyer conjecture for modular abelian varieties of analytic rank zero,
Mathematics of Computation, Vol 74, Number 249, 2005, pages 455-484.
30. Joint with Dave Rusin:
Efficient solution of rational conics: final version, August 2001, (minor revisions Jan 2002) dvi, ps, pdf (23 pages)
Mathematics of Computation, 72 (2003), no. 243, pages 1417-1441.
BibTeX
31. Reduction of binary cubic and quartic forms (31 pages):

BibTeX
32. Modular Forms and Elliptic Curves over Imaginary Quadratic Number Fields (12 pages): dvi, ps
Talk given at ESF conference, Spain 1997 (extended abstract).
Updated version (2008)
33. Review of Ian Stewart's Book "Nature's Numbers", AMS Notices December 1997.
34. Higher Descents on Elliptic Curves (9 pages): dvi, ps (notes for talk).
35. Classical Invariants and 2-descent on Elliptic Curves
• slides for talk (15 pages dvi).
• preprint: dvi, ps (17 pages).
• Published version: Journal of Symbolic Computation (Proceedings of the Second Magma Conference, Milwaukee, May 1996), Jan/Feb 2001, pages 71-87.
BibTeX
36. Joint with P. Serf:
Computing the rank of elliptic curves over real quadratic fields of class number 1
BibTeX
37. Computing Periods of Cusp Forms and modular elliptic curves (12 pages)
Experimental Mathematics 6:2 (1997), pp.97--107
BibTeX
38. Modular Symbols and the computation of Modular Elliptic Curves (31 pages): dvi, ps, gzip'd ps,
Lecture notes for short course given in Bordeaux, May 1995
This is essentially an abbreviated form of Chapter 2 of the book which is now online.
39. The Arithmetic of Elliptic Curves (13 pages): dvi or ps (slides for talk).
40. Computing the Degree of the Modular Parametrization of a Modular Elliptic Curve (16 pages):
Preprint version of Math. Comp. 62 No. 205 (Jan. 1994) pp. 407--429
BibTeX
41. Modular symbols for $\Gamma_1(N)$ and elliptic curves with everywhere good reduction pdf
Math. Proc. Cambridge Philos. Soc. 111 (1992), no. 2, 199--218.
BibTeX
Some earlier papers are available online; some of these may require some kind of authorization. Feel free to email me for offprints. The following is not a complete list.
1. Hyperbolic tessellations, modular symbols, and elliptic curves over complex quadratic fields
Compositio Mathematica, 51 no. 3 (1984), p. 275-324 [BibTeX]
2. Addendum and errata to previous paper
Compositio Mathematica, 63 no. 2 (1987), 271-272 [BibTeX]
3. On GL(n) of a Dedekind Domain
Quarterly Journal of Mathematics 39 (1988) 423-426. [BibTeX]
4. Some density results for negative Pell equations; an application of graph theory
Journal London Math. Soc. 39 (1989) 16 - 28. [BibTeX]
5. Abelian Varieties with Extra Twist, Cusp Forms, and Elliptic Curves Over Imaginary Quadratic Fields
Journal of the London Mathematical Society 45 (1992) 402-416 [BibTeX]
6. (with E. Whitley) Periods of cusp forms and elliptic curves over imaginary quadratic fields
Mathematics of Computation 62 No. 205 (1994), 407-429. [BibTeX]
7. (with P.W.Fowler) Systematics of bonding in non-icosahedral carbon clusters
Theoretica Chimica Acta Volume 73, Number 1 / January, 1988, pp. 1-26 (DOI: 10.1007/BF00526647)
8. (with P.W.Fowler) Fullerenes containing fused triples of pentagonal rings
J. Chem. Soc., Faraday Trans., 1997, 93, 2255 - 2262, DOI: 10.1039/a701271c