Shahrood University of Technology Journal of Algebraic Systems 2345-5128 4 1 2016 09 01 SIGNED ROMAN DOMINATION NUMBER AND JOIN OF GRAPHS 65 77 729 10.22044/jas.2016.729 EN A. Behtoei Department of Mathematics, Imam Khomeini International University, P.O.Box 34149-16818, Qazvin, Iran. E. Vatandoost Department of Mathematics, Imam Khomeini International University, P.O.Box 34149-16818, Qazvin, Iran. F. Azizi Rajol Abad Department of Mathematics, Imam Khomeini International University, P.O.Box 34149-16818, Qazvin, Iran. Journal Article 2016 02 21 In this paper we study the signed Roman domination<br />number of the join of graphs. Specially, we determine it for the<br />join of cycles, wheels, fans and friendship graphs. https://jas.shahroodut.ac.ir/article_729_e681cf062e236a6c154451d27072c3cb.pdf