We call a set of DAGs (directed acyclic graphs) semi-rational if it is accepted by a Petri net. It is shown that the class of semi-rational sets of DAGs coincides with the synchronization closure of Courcelles class of recognizable sets of unranked, unordered trees (or forests). © Springer-Verlag Berlin Heidelberg 2005.
CITATION STYLE
Priese, L. (2005). Semi-rational sets of DAGs. In Lecture Notes in Computer Science (Vol. 3572, pp. 385–396). Springer Verlag. https://doi.org/10.1007/11505877_34
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