Let G be a finite insoluble group with soluble radical R(G). In this paper we investigate the graph of G, which is natural generalisation widely studied commuting graph. Here vertices are elements in G∖R(G), x adjacent to y if they generate subgroup G. Our main result states that always connected and its diameter, denoted δS(G), at most 5. More precisely, show δS(G)⩽3 not almost simple obtain s...
