Abstract
We locate the complexities of evaluating, of inverting, and of testing membership in the image of, morphisms h: Σ* → Δ*. By and large, we show these problems complete for classes within NL. Then we develop new properties of finite codes and of finite sets of words, which yield image membership subproblems that are closely tied to the unambiguous space classes found between L and NL.
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Lange, KJ., McKenzie, P. (1998). On the Complexity of Free Monoid Morphisms. In: Chwa, KY., Ibarra, O.H. (eds) Algorithms and Computation. ISAAC 1998. Lecture Notes in Computer Science, vol 1533. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-49381-6_27
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DOI: https://doi.org/10.1007/3-540-49381-6_27
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