Table 2 Reduced reverse degree-based topological indices.

Gutman and Polansky³⁷

\(RRM1(G) = \sum _{ij\in E(G)}(RR_i + RR_j)\)

Reduced reverse first Zagreb index

Gutman and Polansky³⁷

\(RRM2(G) = \sum _{ij\in E(G)}(RR_i * RR_j)\)

Reduced reverse second Zagreb index

Martınez-Martınez et al.³⁸

\(RRH(G) = \sum _{ij\in E(G)}\frac{2}{(RR_i + RR_j)}\)

Reduced reverse harmonic index

Furtula and Gutman³⁹

\(RRF(G) = \sum _{ij\in E(G)}[(RR_i)^2 + (RR_j)^2]\)

Reduced reverse forgotten index

Zhao⁴⁰

\(RRSS(G) = \sum _{ij\in E(G)}\sqrt{\frac{RR_i * RR_j}{RR_i + RR_j}}\)

Reduced reverse Shilpa-Shanmukha index

Estrada et al.^41,42

\(RRABC(G) = \sum _{ij\in E(G)}\sqrt{\frac{RR_i + RR_j -2}{RR_i * RR_j}}\)

Reduced reverse atom bond connectivity index

Randić et al.⁴³

\(RRRI(G) = \sum _{ij\in E(G)}\frac{1}{\sqrt{RR_i * RR_j}}\)

Reduced reverse randic index

Furtula et al.⁴⁴

\(RRSC(G) = \sum _{ij\in E(G)}\frac{1}{\sqrt{RR_i + RR_j}}\)

Reduced reverse sum connectivity index

Vukicevic et al.⁴⁵

\(RRGA(G) = \sum _{ij \in E(G)} 2\frac{\sqrt{RR_i * RR_j}}{RR_i + RR_j}\)

Reduced reverse geometric arithmetic index

Rajasekharaiah et al.⁴⁶

\(RRHZ(G) = \sum _{ij \in E(G)} (RR_i + RR_j)^2\)

Reduced reverse hyper Zagreb index

Ranjini⁴⁷

\(RRReZ1(G) = \sum _{ij\in E(G)}\frac{RR_i * RR_j}{RR_i + RR_j}\)

Reduced reverse redefined first Zagreb index

Ranjini⁴⁷

\(RRReZ2(G) = \sum _{ij\in E(G)}(RR_i * RR_j )* (RR_i + RR_j)\)

Reduced reverse redefined second Zagreb index