**2. Layer Structure of** *H***3***BO***3(***s***,***t***)**

In this section, we discuss the *H*3*BO*3(*s*, *t*) layer structure, which serves as the foundation for its subdivision and line graph. The *H*3*BO*3(*s*, *t*) unit structure polymerizes to generate the floral pattern structure (base unit) seen in Figure 2, which is made up of six repeating *H*3*BO*<sup>3</sup> units. This layer structure may be stretched to whatever number of rows and columns is desired. The horizontal lines of floral pattern structures are characterized as rows "s", while the vertical lines are designated as columns "t". Figure 2 depicts *H*3*BO*3(*s*, *t*) with one row and two columns, s = 1 and t = 2.

**Figure 2.** Layer structure of *H*3*BO*3.

*2.1. Subdivision of the Layer Structure H*3*BO*3(*s*, *t*)

Figure 3 shows the subdivision of *H*3*BO*3(*s*, *t*), the layer structure achieved by installing one atom between each atom–bond of Figure 2.

**Figure 3.** Subdivision of *H*3*BO*3.

#### Result and Discussion

In subdivision of the layer structure *H*3*BO*3(*s*, *t*), the atom–bond *E*(*G*) is divided into three groups based on the degree of each edge's end vertices. The set that is disjointed is shown by the symbols *ξ*(*d*(*ui*),*d*(*Vj*)). The first set that is disjointed is *ξ*(1,2), the second set that is disjointed is *ξ*(2,2), and the third set that is disjointed is *ξ*(2,3). The table below describes the different types of edges as well as the equations for calculating the number of edges in each type of the S*H*3*BO*3(*s*, *t*) layer structure.
