Szukana fraza: [Abstract = Determining whether the Petri net is live is very important, because a good system should not contain events, which can never occur. Testing the liveness \(boundedness\) of Petri net depend on finding deadlock and traps and researching dependence between theirs. Within of a framework of project prepared a new method analysis of digital controllers modeled using hierarchical Petri nets. A Petri nets is a mathematical object that exists independently of any physical representation. The nets can effectively describe parallelism. Their graphical form is used as a tool for the modeling and analysis of digital circuits, especially concurrent controllers.]

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