Let G=(V,E) be a simple graph, f: V(G) ? {1, 2, ..., |V(G)|} be a bijective function and ?: E(G) ? {+,-} be a mapping such that ? (uv)=+, whenever f(u)+f(v) ? n and ? (uv)=-, whenever f(u)+f(v)>n. Then, S=(G,f,?) is said to be a sum signed graph. In this paper, we initiate the study of sum signed graphs. Also, we find rna number for some classes of graphs and present some of the characteristics of sum signed graphs. 2020 Author(s).
https://doi.org/10.1063/5.0019053 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095611169&doi=10.1063%2f5.0019053&partnerID=40&md5=469d7912607d94f27fcdab0254eaf005
Ranjith A.P., Christ University, Department of Mathematics, Bangalore, India; Kureethara J.V., Christ University, Department of Mathematics, Bangalore, India