On the state complexity of closures and interiors of regular languages with subwords and superwords

Theor. Comput. Sci., pp. 91-107, 2016.

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Abstract:

The downward and upward closures of a regular language $L$ are obtained by collecting all the subwords and superwords of its elements, respectively. The downward and upward interiors of $L$ are obtained dually by collecting words having all their subwords and superwords in $L$, respectively. We provide lower and upper bounds on the size...More

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