A small morphism giving Abelian repetition threshold less than 2
CoRR（2023）
摘要
It is known that there are infinite words over finite alphabets with Abelian
repetition threshold arbitrarily close to 1; however, the construction
previously used involves huge alphabets. In this note we give a short cyclic
morphism (length 13) over an 8-letter alphabet yielding an Abelian repetition
threshold less than 1.8.
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