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    • Computer Science PDF Available DOI: 10.46298/fi.10954 Non-peer-reviewed Preprint

    Commuting upper triangular binary morphisms

    Juha Honkala  ·  Published 2023-02-13
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    Abstract

    A morphism $g$ from the free monoid $X^*$ into itself is called upper triangular if the matrix of $g$ is upper triangular. We characterize all upper triangular binary morphisms $g_1$ and $g_2$ such that $g_1g_2=g_2g_1$.
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