Double domination in fuzzy soft graphs

Abstract

In this article, we introduced the study of double domination and cardinality number of a fuzzy soft graph and operation of
a fuzzy soft graph like union, intersection, Cartesian are explained. A subset D of V in a fuzzy soft graph is a double
dominating set of graph if for each vertex in V is dominated by at least two vertices in D. The double domination number
of a fuzzy soft graphGA,V, is the minimum cardinality of a double dominating set D and is denoted by γdd (GA,V).