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arXiv · 1610.00728

Complexity of Left-Ideal, Suffix-Closed and Suffix-Free Regular Languages

Janusz Brzozowski·Corwin Sinnamom
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Abstract

A language $L$ over an alphabet $\Sigma$ is suffix-convex if, for any words $x,y,z\in\Sigma^*$, whenever $z$ and $xyz$ are in $L$, then so is $yz$. Suffix-convex languages include three special cases: left-ideal, suffix-closed, and suffix-free languages. We examine complexity properties of these three special classes of suffix-convex regular languages. In particular, we study the quotient/state complexity of boolean operations, product (concatenation), star, and reversal on these languages, as well as the size of their syntactic semigroups, and the quotient complexity of their atoms.

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Janusz Brzozowski, Corwin Sinnamom. 2016-10-03. Complexity of Left-Ideal, Suffix-Closed and Suffix-Free Regular Languages. https://arxiv.org/abs/1610.00728

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