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This paper extends the Krausz and Whitney theorems to signed line graphs, highlighting key relationships.
A signed line graph of a simply signed graph extends the notion of a generalized line graph defined in the framework of ordinary graphs. In this paper, the Krausz theorem on covering characterization of line graphs and the Whitney theorem on isomorphism are extended to the context of signed line graphs.
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Zoran Stanić (2025) studied this question.
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