ON SECOND AND THIRD LEAP ZAGREB COINDICES OF SOME GRAPH OPERATIONS

Recently, the authors introduced the leap Zagreb coindices (LZCIs) of graphs. They presented many properties, so also, established upper and lower bounds for them. They, also in last work, studied and presented the general formulas for the first leap Zagreb coindex of some operations of a graph. In the present work, we investigate to continue in our work by computing the general formulas of the second and third LZCIs of union, cartesian product, composition, disjunction, symmetric difference of graphs.