Abstract: This work provides some basic concepts how to represent basic or elementary Petri nets by building on previous work presented in [11],[12]. Here the three main types of matrices used for Petri net representation are the input, output and incidence matrices. These are defined and explained. Some toy examples are used as proof of concept. The main raison d’être for this paper is to show that matrices are suitable to provide alternative description of Petri nets from the traditional graphical approach that is normally used. It is clearly indicated that several properties can be inferred or derived from simple examination of these matrices. A few definitions and examples are used.
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