Conjecture on occurrence sequences in base-phi expansions
Conjecture on occurrence sequences in base-phi expansions
Let be the base-phi expansion of the number . Let be a word of length , and let be the sequence of occurrences of numbers whose first digits of are , namely
Let , , and denote the families of sequences whose first differences are respectively the fixed points of the morphisms , , and , with arbitrary integer first element. Occurrence-sequence conjecture. There exist two Lucas numbers and such that is one of , , or . Alternatively, is a union of three sequences of these types. This conjecture proposes a uniform description of occurrence sequences arising from prefixes of the negative part of base-phi expansions; the paper's preceding examples motivate the three fixed-point families, but the supplied text gives no resolution.
Sources & referencesView supporting material
Primary source
F. Michel Dekking, “The structure of base phi expansions”, arXiv:2305.08349 (2023).
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