The paper introduces minimal and shortest absent subsequences, gives combinatorial characterizations with compact representations, and provides efficient algorithms to test membership and compute the lexicographically smallest ones along with a query data structure.
The influence of Imre Simon’s work in the theory of automata, languages and semigroups
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Absent Subsequences in Words
The paper introduces minimal and shortest absent subsequences, gives combinatorial characterizations with compact representations, and provides efficient algorithms to test membership and compute the lexicographically smallest ones along with a query data structure.