Vertex-Edge Degree Based Indices of Honey Comb Derived Network

Chemical graph theory is a branch of mathematics which combines graph theory and chemistry. Chemical reaction network theory is a territory of applied mathematics that endeavors to display the conduct of genuine compound frameworks. It pulled the research community due to its applications in theoretical and organic chemistry since 1960. Additionally, it also increases the interest the mathematicians due to the interesting mathematical structures and problems are involved. The structure of an interconnection network can be represented by a graph. In the network, vertices represent the processor nodes and edges represent the links between the processor nodes. Graph invariants play a vital feature in graph theory and distinguish the structural properties of graphs and networks. In this paper, we determined the newly introduced topological indices namely, first ve-degree Zagreb index, first ve-degree Zagreb index, second ve-degree Zagreb index, ve-degree Randic index, ve-degree atom-bond connectivity index, ve-degree geometric-arithmetic index, ve-degree harmonic index and ve-degree sum-connectivity index for honey comb derived network. In the analysis of the quantitative structure property relationships (QSPRs) and the quantitative structureactivity relationships (QSARs), graph invariants are important tools to approximate and predicate the properties of the biological and chemical compounds. Also, we give the numerical and graphical representation of our outcomes.


Introduction
A structural molecular diagram is a basic diagram in the study of structural chemical graph theory where atoms are spoken to by nodes and chemical bonds are spoken to by lines. A diagram is associated if there is an association between any pair of nodes. A network is an associated diagram that has no various lines between two nodes and loop. The number of nodes which are associated with a fixed node v is known as the degree of v and is denoted by d v . The collection of all the adjacent nodes to the node v is referred to open neighborhood of v and can be represented by N ðvÞ. The open neighborhood became the closed neighborhood when we include the node v in the collection and is represented by N ½v. The shortest distance between two vertices u,v ∈V(G) is denoted by d (u,v), and the maximum value of d (u,v) in G is called the diameter of G, denoted as diam(G). For basic definition, see West [1].
The relation between the ðQSPRÞ and ðQSARÞ predict the properties and natural exercises of unstudied material. In these materials, the topological indices and some physico-chemical properties are utilized to anticipate bioactivity for chemical compounds [2][3][4][5]. A number represents a topological index in a diagram of a chemical compound, which can be utilized to portray the underlined chemical compound and help to foresee its physio-chemical properties. In 1947 Weiner established the framework of topological index. He was approximated the breaking point of alkanes and presented the Weiner index [6]. In 1975, Milan Randic presented Randic index [7]. In 1998, Bollobas et al. [8] and Amic et al. [9] proposed the general Randic index and has been concentrated by both scientist and mathematicians [10]. The Randic index is one of the most important and generally considered and applied topological index. Numerous surveys, papers and books [11][12][13][14][15][16] are composed on graph invariant. For detail of different topological indices, see [17][18][19][20][21][22]. Chellali et al. [23] introduced two novel degree thoughts which they called "ve-degree and ev-degree". Horoldagva et al. [24] contributed to the study related to "ve-degree and ev-degree". The new style degree base indices have been applied to already existing indices and found the better results in [25][26][27]. It has been found that the ve-degree Zagreb index has more grounded estimate power than the old-style Zagreb index.

The ve-degree and ev-degree Based Topological Indices
Chellali et al. [23] gave the definition of ev-degree of an edge e ¼ uv 2 E which is denoted by d ev ðeÞ, and is the cardinality of nodes of the union of the closed neighborhoods of u and v. The ve-degree of the node v 2 V , denoted by d ve ðvÞ, and is the cardinality of lines of different lines that are incident to any node from the closed neighborhood of v. Throughout this paper we consider G is a connected graph, e ¼ uv 2 EðGÞ and v 2 V . For some basic definitions regarding "ev-degree and ve-degree topological indices" [28][29][30]. The topological indices related to ev-degree are: The ev-degree Zagreb index, ev-degree Randic index, The topological indices related to ev-degree are: The first ve-degree Zagreb a index, first ve-degree Zagreb b index, second ve-degree Zagreb index, ve-degree Randic index, ve-degree atom-bond connectivity index, ve-degree geometric-arithmetic index, ve-degree harmonic index and ve-degree sum-connectivity index.

Main Results
In the present section, we determined our computational results for Honey Comb derived network (see Fig. 1), which is a planar graph. The number of nodes and lines in HcDN 1ðnÞ are 9n 2 À 3n þ 1 and 27n 2 À 21n þ 6 respectively.
There are five types of lines in HcDN 1ðnÞ based on degrees of end nodes of each line. Tab. 1 shows line partition of HcDN 1ðnÞ. Tab. 2 represents the number of nodes corresponding their degrees.
In Tab. 3, We partition the lines, based on ev-degree of the HcDN 1. In Tabs. 4 and 5, we partition the nodes, based on ve-degree of HcDN 1.

Conclusion
There are many applications of topological descriptors in computer science, networks, agriculture and chemical graph theory etc. These descriptors help in finding the behavior of their structures. We dealt with the honey comb derived network and computed ten different types of topological descriptors which are base on ev and ve degree. We have computed their explicit formulas and then computed their numerical values for different values of n. Further we plotted their graphs for comparison and discussed their behavior. We observe that the values of all descriptors increases with the increase value of n. In the analysis of the quantitative structure property relationships (QSPRs) and the quantitative structureactivity relationships (QSARs), graph invariants are important tools to approximate and predicate the properties of the biological and chemical compounds. In this paper, we study the vertex-edge based topological indices for honey comb derived network.