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Showing 1 to 1 of 1 for “"word extensions"”.
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Forbidden-Patterns and Word Extensions for Concatenation Hierarchies
… level 1/2 of the STH. A technique which uses word extensions plays the central role in the proofs of these results. With this technique it is possible to treat the levels 1/2 and 3/2 of both hierarchies in a uniform way. Furthermore, it can be used to prove the decidability of the mentioned …