Silicon carbide (SiC), also called carborundum, is a semiconductor containing silicon and carbon. Dendrimers are repetitively branched molecules that are typically symmetric around the core and often adopt a spherical three-dimensional morphology. Bismuth(III) iodide is an inorganic compound with the formula . This gray-black solid is the product of the reaction between bismuth and iodine, which once was of interest in qualitative inorganic analysis. In chemical graph theory, we associate a graph to a compound and compute topological indices that help us in guessing properties of the understudy compound. A topological index is the graph invariant number, calculated from a graph representing a molecule. Most of the proposed topological indices are related either to a vertex adjacency relationship (atom-atom connectivity) in the graph or to topological distances in the graph. In this paper, we aim to compute the first and second Gourava indices and hyper-Gourava indices for silicon carbides, bismuth(III) iodide, and dendrimers.

中文翻译：

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药物应用中碳化硅、碘化铋 (III) 和树枝状聚合物的基于价态的描述符

碳化硅 (SiC)，也称为金刚砂，是一种含有硅和碳的半导体。树枝状聚合物是重复分支的分子，通常围绕核心对称，通常采用球形三维形态。碘化铋 (III) 是一种无机化合物，具有化学式 。这种灰黑色固体是铋和碘反应的产物，曾经在定性无机分析中很受关注。在化学图论中，我们将图与化合物相关联并计算拓扑指数，以帮助我们猜测待研究化合物的性质。拓扑索引是图不变数，从代表分子的图计算。大多数提议的拓扑索引与图中的顶点邻接关系（原子-原子连接）或图中的拓扑距离有关。在本文中，我们旨在计算碳化硅、碘化铋 (III) 和树枝状聚合物的第一和第二 Gourava 指数和超 Gourava 指数。