On the entropy and letter frequencies of ternary square-free wordsReport as inadecuate

Author: Christoph Richard and Uwe Grimm

Source: https://core.ac.uk/


We enumerate all ternary length-1 square-free words, which are words avoiding squares of words up to length 1, for 1<=24.
We analyse the singular behaviour of the corresponding generating functions.
This leads to new upper entropy bounds for ternary square-free words.
We then consider ternary square-free words with\ud fixed letter densities, thereby proving exponential growth for certain ensembles with various letter densities.
We derive consequences for the free energy and entropy of\ud ternary square-free words ...

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