2023-02-09
The Thue–Morse sequence in Base 3/2
Publication
Publication
Journal of Integer Sequences , Volume 26 - Issue 2
We discuss the base 3/2 representation of the natural numbers. We prove that the sum-of-digits function of the representation is a fixed point of a 2-block substitution on an infinite alphabet, and that this implies that sum-of-digits function modulo 2 of the representation is a fixed point x3/2 of a 2-block substitution on {0,1}. We prove that x3/2 is invariant for taking the binary complement, and present a list of conjectured properties of x3/2, which we think will be hard to prove. Finally, we make a comparison with a variant of the base 3/2 representation, and give a general result on p-q-block substitutions.
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Journal of Integer Sequences | |
Dekking, M. (2023). The Thue–Morse sequence in Base 3/2. Journal of Integer Sequences, 26(2). |