Statistical (3x+1)  problem
Abstract
Take an odd number x >0. Then 3x+1 is even and one can find an integer k> 0 so that y= 3x+1/2^k is again odd. We get in this way the mapping T, Tx=y. The paper contains two theorems describing statistical properties of T. The first describes statistical properties of trajectories for large x. The second gives some information about the probability distribution appearing in this problem.
 Publication:

arXiv Mathematics eprints
 Pub Date:
 January 2002
 DOI:
 10.48550/arXiv.math/0201102
 arXiv:
 arXiv:math/0201102
 Bibcode:
 2002math......1102S
 Keywords:

 Mathematics  Dynamical Systems
 EPrint:
 15 pages, AMS tex. To be published in Comm. Pure Appl. Math. The second part of the paper is much shorter and significantly modified