can be specified in matrix form as follows:
0 0 0 0 1
1 0 0 0 0
0 1 0 0 0
0 0 1 1 0
1 1 0 0 0
0 0 1 1 0
0 0 0 1 0
0 0 0 0 1
1 1 0 0 0 0 0 0 0 1 1 1 0 0 -1 0 0 1 1 0 - 1 0 0 0 0 = -1 0 1 1 0 0 0 0 1 0 0 1 0 0 0 0 -1 0 1 0 0 0 0 0 1 0 0 1 1 0 0 0 -1 -1 1D matrix for PN of Fig. 1:
1 1 0 0 -1
-1 0 1 1 0
0 -1 0 1 0
0 0 -1 -1 1
[0 1 1 0] 1 1 0 0 -1 + [2 1 0 0 0] = [1 0 1 2 0] -1 0 1 1 0 0 -1 0 1 0 0 0 -1 -1 1Next Marking matrix for Fig. 1: [1 0 1 2 0]
[0 1 0 1] 1 1 0 0 -1 + [1 0 1 2 0] = [0 0 1 2 1] -1 0 1 1 0 0 -1 0 1 0 0 0 -1 -1 1Next Marking matrix for Fig. 2: [0 0 1 2 1]
[1 0 0 1] 1 1 0 0 -1 + [0 0 1 2 1] = [1 1 0 1 1] -1 0 1 1 0 0 -1 0 1 0 0 0 -1 -1 1Next Marking matrix for Fig. 3: [1 1 0 1 1]
[1 1 1 0] 1 1 0 0 -1 + [1 1 0 1 1] = [1 1 1 3 0] -1 0 1 1 0 0 -1 0 1 0 0 0 -1 -1 1Next Marking matrix for Fig. 4: [1 1 1 3 0]