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|[[Characteristic Logic Equation]] | |[[Characteristic Logic Equation]] | ||
|Expresses the necessary and sufficient conditions to be satisfied by the entries in an [[Interconnection Matrix]] M<sub>BA</sub>, that interconnects two hierarchical digraphs A<sup>*</sup> and B<sup>*</sup> for which M<sub>AB</sub> = 0. | |Expresses the necessary and sufficient conditions to be satisfied by the entries in an [[Interconnection Matrix]] M<sub>BA</sub>, that interconnects two hierarchical digraphs A<sup>*</sup> and B<sup>*</sup> for which M<sub>AB</sub> = 0. | ||
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|[[Cascade Interconnection of Digraphs]] | |||
|Two digraphs are said to be cascaded if all interconnections are oriented from one of the digraphs to the other. | |||
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|[[Digraphs]] | |||
|A directed graph, also called a digraph, is a graph in which the edges have a direction. | |||
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