Closed Ziv-Lempel factorization of the $m$-bonacci words

Marieh Jahannia, Morteza Mohammad-noori, Narad Rampersad, Manon Stipulanti

A word $w$ is said to be closed if it has a proper factor $x$ which occurs exactly twice in $w$, as a prefix and as a suffix of $w$. Based on the concept of Ziv-Lempel factorization, we define the closed $z$-factorization of finite and infinite words. Then we find the closed $z$-factorization of the infinite $m$-bonacci words for all $m \geq 2$. We also classify closed prefixes of the infinite $m$-bonacci words.

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