|
Badly approximable numbers and vectors in Cantor-like sets
Authors:
S. G. Dani and Hemangi Shah
Journal:
Proc. Amer. Math. Soc. 140 (2012), 2575-2587
MSC (2010):
Primary 11J25, 37D40, 37C35
Posted:
November 28, 2011
Full-text PDF
Abstract |
References |
Similar Articles |
Additional Information
Abstract: We show that a large class of Cantor-like sets of , contains uncountably many badly approximable numbers, respectively badly approximable vectors, when . An analogous result is also proved for subsets of arising in the study of geodesic flows corresponding to -dimensional manifolds of constant negative curvature and finite volume, generalizing the set of badly approximable numbers in . Furthermore, we describe a condition on sets, which is fulfilled by a large class, ensuring a large intersection with these Cantor-like sets.
References
- [1]
C.
S. Aravinda and Enrico
Leuzinger, Bounded geodesics in rank-1 locally symmetric
spaces, Ergodic Theory Dynam. Systems 15 (1995),
no. 5, 813–820. MR 1356615
(96h:53050), http://dx.doi.org/10.1017/S0143385700009640
- [2]
M.
Bachir Bekka and Matthias
Mayer, Ergodic theory and topological dynamics of group actions on
homogeneous spaces, London Mathematical Society Lecture Note Series,
vol. 269, Cambridge University Press, Cambridge, 2000. MR 1781937
(2002c:37002)
- [3]
R. Broderick, L. Fishman and D. Kleinbock, Schmidt's game, fractals, and orbits of toral endomorphisms, Ergod. Th. Dynam. Sys. 31 (2011), 1095-1117.
- [4]
S.G. Dani, Bounded geodesics on manifolds of negative curvature, preprint, 1986 (unpublished).
- [5]
S.
G. Dani, Bounded orbits of flows on homogeneous spaces,
Comment. Math. Helv. 61 (1986), no. 4, 636–660.
MR 870710
(88i:22011), http://dx.doi.org/10.1007/BF02621936
- [6]
S.
G. Dani, On badly approximable numbers, Schmidt games and bounded
orbits of flows, Number theory and dynamical systems (York, 1987)
London Math. Soc. Lecture Note Ser., vol. 134, Cambridge Univ. Press,
Cambridge, 1989, pp. 69–86. MR 1043706
(91d:58200), http://dx.doi.org/10.1017/CBO9780511661983.006
- [7]
S.
G. Dani, On orbits of endomorphisms of tori and the Schmidt
game, Ergodic Theory Dynam. Systems 8 (1988),
no. 4, 523–529. MR 980795
(90b:58145), http://dx.doi.org/10.1017/S0143385700004673
- [8]
Lior
Fishman, Schmidt’s game on fractals, Israel J. Math.
171 (2009), 77–92. MR 2520102
(2010d:11079), http://dx.doi.org/10.1007/s11856-009-0041-x
- [9]
Lior
Fishman, Schmidt’s game, badly approximable matrices and
fractals, J. Number Theory 129 (2009), no. 9,
2133–2153. MR 2528057
(2010j:11123), http://dx.doi.org/10.1016/j.jnt.2009.02.005
- [10]
Dmitry
Kleinbock and Barak
Weiss, Badly approximable vectors on fractals, Israel J. Math.
149 (2005), 137–170. Probability in mathematics. MR 2191212
(2008d:11079), http://dx.doi.org/10.1007/BF02772538
- [11]
D. Kleinbock and B. Weiss, Modified Schmidt games and a conjecture of Margulis, preprint, 2010. arXiv:1001.5017vl [math.DS] 27 Jan 2010
- [12]
Curtis
T. McMullen, Winning sets, quasiconformal maps and Diophantine
approximation, Geom. Funct. Anal. 20 (2010),
no. 3, 726–740. MR 2720230
(2012a:30061), http://dx.doi.org/10.1007/s00039-010-0078-3
- [13]
Wolfgang
M. Schmidt, On badly approximable numbers and certain games,
Trans. Amer. Math. Soc. 123 (1966), 178–199. MR 0195595
(33 #3793)
- [14]
Wolfgang
M. Schmidt, Diophantine approximation, Lecture Notes in
Mathematics, vol. 785, Springer, Berlin, 1980. MR 568710
(81j:10038)
Similar Articles
Retrieve articles in Proceedings of the American Mathematical Society
with MSC (2010):
11J25,
37D40,
37C35
Retrieve articles in all journals
with MSC (2010):
11J25,
37D40,
37C35
Additional Information
S. G. Dani
Affiliation:
School of Mathematics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
Email:
dani@math.tifr.res.in
Hemangi Shah
Affiliation:
Department of Mathematics, Indian Institute of Science, Bangalore 560012, India
Email:
hemangi@math.iisc.ernet.in
DOI:
http://dx.doi.org/10.1090/S0002-9939-2011-11105-5
PII:
S 0002-9939(2011)11105-5
Received by editor(s):
February 7, 2011
Received by editor(s) in revised form:
March 3, 2011
Posted:
November 28, 2011
Additional Notes:
The second author thanks the Tata Institute of Fundamental Research, Mumbai, and the National Board for Higher Mathematics for support through Research Fellowships while this work was being done.
The authors thank the referee for helpful suggestions.
Communicated by:
Bryna Kra
Article copyright:
© Copyright 2011 American Mathematical Society
The copyright for this article reverts to public domain after
28 years from publication.
|