Date: 24 Jun 2003

The Ehrenfeucht-Mycielski Sequence

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We study the disjunctive binary sequence introduced by Ehrenfeucht and Mycielski in [1]. The match length associated to the bits of the sequence is shown to be a crucial tool in the analysis of the sequence. We show that the match length between two consecutive bits in the sequence differs at most by 1 and give a lower bound for the limiting density of the sequence. Experimental computation in the automata package has been very helpful in developing these results.