The triangular line n-sigraph of a symmetric n-sigraph

Review : The authors define the triangle line symmetric n-sigraph of a symmetric n-sigraph, a concept analogous to the triangular line graph of a graph. They show that the triangular line symmetric n-sigraph of any symmetric n-sigraph is i-balanced and derive structural characterization of such sigraphs. They also obtain a switching equivalence relationship between a triangular line symmetric n-sigraph and a line symmetric n-sigraph.