Journal of Integer Sequences, Vol. 12 (2009), Article 09.3.6

The Shape of the Value Sets of Linear Recurrence Sequences


Stefan Gerhold
Vienna University of Technology
1040 Vienna
Austria
and
Microsoft Research-INRIA
91893 Orsay
France

Abstract:

We show that the closure of the value set of a real linear recurrence sequence is the union of a countable set and a finite collection of intervals. Conversely, any finite collection of closed intervals is the closure of the value set of some recurrence sequence.


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Received March 25 2009; revised version received April 14 2009. Published in Journal of Integer Sequences, April 27 2009.


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