Relating the ABC and harmonic indices

Abstract

The atom-bond connectivity (ABC) index is a much-studied molecular structure descriptor, based on the degrees of the vertices of the molecular graph. Recently, another vertex-degree-based topological index - the harmonic index (H) - attracted attention and gained popularity. We show how ABC and H are related.

Keywords

• topological index
• degree-based topological index
• atom-bond connectivity index
• ABC index
• harmonic index