On Harmonic Index and Diameter of Quasi-Tree Graphs

<div>The graphs related to Subcase 2.1 of Theorems <a href="https://static.hindawi.com/articles/jmath/volume-2021/6650407/figures/#thm3">3</a> and <a href="https://static.hindawi.com/articles/jmath/volume-2021/6650407/figures/#thm4">4</a>.</div>

Journal of Mathematics

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Figure 7

Figure 7: On Harmonic Index and Diameter of Quasi-Tree Graphs 