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math.CO2026
On Occurrence-Preserving Morphisms
Kaisei Kishi, Peaker Guo, Cristian Urbina +1
A \emph{morphism} is a mapping that transforms words through letter-wise substitution, where each symbol is consistently replaced by a fixed word. In the field of combinatorics on…
math.CO2026
The Smallest String Attractors of Fibonacci and Period-Doubling Words
Mutsunori Banbara, Hideo Bannai, Peaker Guo +3
A string attractor of a string is a set of positions of such that any substring of has an occurrence that crosses a position in , i.e., there is a…