Noor-ul-HudaSP21-RMT-015/Prof. Dr. Kashif Ali2026-03-182021https://repository.cuilahore.edu.pk/handle/123456789/2943Mostar invariant is an advance bond additive invariant that was presented in the near past. We obtain results for different variants of weighted Moster indices. Furthermore, we de- termine the numerical expressions for different versions of weighted plus and product PI indices for chemical structures such as Melem chain nanostructure, Poly-methyl methacry- late network PMMA and SIOen-USMostar InvariantsThesis