A measurement of the molecular topology of graphs is known as a topological index, and several physical and chemical properties such as heat formation, boiling point, vaporization, enthalpy, and entropy are used to characterize them. Graph theory is useful in evaluating the relationship between various topological indices of some graphs derived by applying certain graph operations. Graph operations play an important role in many applications of graph theory because many big graphs can be obtained from small graphs. Here, we discuss two graph operations, i.e., double graph and strong double graph. In this article, we will compute the topological indices such as geometric arithmetic index
GA
, atom bond connectivity index
ABC
, forgotten index
F
, inverse sum indeg index
ISI
, general inverse sum indeg index
ISI
α
,
β
, first multiplicative-Zagreb index
PM
1
and second multiplicative-Zagreb index
PM
2
, fifth geometric arithmetic index
GA
5
, fourth atom bond connectivity index
ABC
4
of double graph, and strong double graph of Dutch Windmill graph
D
3
p
.
Vertex-Based Topological Indices of Double and Strong Double Graph of Dutch Windmill Graph
