Some sources state that Petri nets were invented in August 1939 by Carl Adam Petri-at the age of 13-for the purpose of describing chemical processes. A transition is enabled if all places connected to it as inputs contain at least one token. ![]() Place elements are depicted as white circles and transition elements are depicted as rectangles.Ī place can contain any number of tokens, depicted as black circles. A Petri net is a directed bipartite graph that has two types of elements, places and transitions. It is a class of discrete event dynamic system. ![]() One of several mathematical modeling systems for the description of distributed systemsĪ Petri net, also known as a place/transition (PT) net, is one of several mathematical modeling languages for the description of distributed systems.
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