Harmonic Index Calculator

harmonic mean connectivity

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About Harmonic Index Calculator

A harmonic index calculator computing H(G) = Σ_{(i,j)∈E} 2/(d(i)+d(j)). Fajtlowicz (1987). Harmonic mean of degrees along edges. H ≥ n/2·1/(δ+Δ). Strong correlations with Randić index. Used in QSAR predictions. Client-side.

Harmonic Index Calculator Features

  • H(G)
  • 2/(dᵢ+dⱼ)
  • Fajtlowicz
  • QSAR
  • Common graphs

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