|
A conjecture on rational approximations to rational points
Author(s):
David
McKinnon
Journal:
J. Algebraic Geom.
16
(2007),
257-303.
Posted:
November 8, 2006
Retrieve article in:
PDF DVI PostScript
Abstract |
References |
Additional information
Abstract:
In this paper, we examine how well a rational point on an algebraic variety can be approximated by other rational points. We conjecture that if lies on a rational curve, then the best approximations to on can be chosen to lie along a rational curve. We prove this conjecture for a wide range of examples, and for a great many more examples we deduce our conjecture from Vojta's Main Conjecture.
References:
-
- [Be]
- Beauville, A., Complex Algebraic Surfaces, Cambridge University Press, 1996. MR 1406314 (97e:14045)
- [Dr]
- Drozd, E., ``Curves on a nonsingular Del Pezzo Surface in
'', preprint, arXiv.org/math.AG/0410518, 2004. - [Ha]
- Hartshorne, R., Algebraic Geometry, Springer-Verlag, New York, 1977. MR 0463157 (57:3116)
- [Ho]
- Hosoh, T., ``Automorphism groups of quartic del Pezzo surfaces'', J. Algebra 185 (1996), 374-389. MR 1417377 (97i:14026)
- [Ko]
- Kovács, S., ``The cone of curves of a K3 surface'', Math. Annalen 300 (1994), no. 4, 681-691. MR 1314742 (96a:14044)
- [Ma]
- Manin, Yu., Cubic Forms (trans. M. Hazewinkel), Elsevier Science Publishers, 1986. MR 0833513 (87d:11037)
- [M1]
- McKinnon, David, ``Counting Rational Points on Ruled Varieties'', Canad. Math. Bull. 47 (2004), no. 2, 264-270. MR 2059421 (2005c:11088)
- [Tsch]
- Tschinkel, Yu., ``Fujita's Program and Rational Points'', in Higher Dimensional Varieties and Rational Points, Springer-Verlag, 2003. MR 2011749 (2004g:14024)
- [Vo]
- Vojta, P., Diophantine Approximations and Value Distribution Theory, Springer Lecture Notes in Mathematics, 1239, Springer-Verlag, 1987. MR 0883451 (91k:11049)
Additional Information:
David
McKinnon
Affiliation:
Department of Pure Mathematics, University of Waterloo, Waterloo, ON N2L 3G1 Canada
Email:
dmckinnon@math.uwaterloo.ca
PII:
S 1056-3911(06)00458-9
Received by editor(s):
May 16, 2005
Received by editor(s) in revised form:
April 24, 2006
Posted:
November 8, 2006
Additional Notes:
This research was supported in part by NSERC grant 250196-02
|