Table 1 Degree-based topological index expressions.
Topological Index | Notation | \(\Omega (\alpha ,\beta )\) |
|---|---|---|
Randić40 | R | \(\displaystyle \frac{1}{\sqrt{\alpha \beta }}\) |
Reciprocal Randić41 | RR | \(\displaystyle \sqrt{\alpha \beta }\) |
First Zagreb42 | \(M_{1}\) | \(\displaystyle \alpha +\beta\) |
Second Zagreb42 | \(M_{2}\) | \(\displaystyle \alpha \beta\) |
Atom Bond Connectivity43 | ABC | \(\displaystyle \sqrt{\frac{\alpha +\beta -2}{\alpha \beta }}\) |
Sum Connectivity44 | SC | \(\displaystyle \frac{1}{\sqrt{\alpha +\beta }}\) |
Geometric Arithmetic45 | GA | \(\displaystyle \frac{2\sqrt{\alpha \beta }}{\alpha +\beta }\) |
Harmonic46 | H | \(\displaystyle \frac{2}{\alpha +\beta }\) |
Hyper Zagreb47 | HM | \(\displaystyle (\alpha +\beta )^{2}\) |
Forgotten48 | F | \(\displaystyle (\alpha ^{2}+\beta ^{2})\) |
Augmented Zagreb49 | AZ | \(\displaystyle \bigg (\frac{\alpha \beta }{\alpha +\beta -2}\bigg )^{3}\) |
