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The notion of corona of two graphs was introduced by Frucht and Harary in1970. In this paper we generalize their definition of corona product of twographs and introduce corona product of two signed graphs by utilizing theframework of marked graphs, which was introduced by Beineke and Harary in 1978.We study the structural and spectral properties of corona product of signedgraphs. Further we define signed corona graphs by considering corona product ofa fixed small signed graph with itself iteratively, and we call the small graphas the seed graph for the corresponding corona graphs. Signed corona graphs canbe employed as a signed network generative model for large growing signednetworks. We study structural properties of corona graphs that includestatistics of signed links, all types of signed triads and degree distribution.Besides we analyze algebraic conflict of signed corona graphs generated byspecially structured seed graphs. Finally we show that a suitable choice of aseed graph can produce corona graphs which preserve properties of real signednetworks.

Corona product of signed graphs and its application to signed network modelling