The phrase "" typically refers to research in Graph Theory , specifically the "Randić index" or "Harmonic index" in the context of triangle-free graphs. The primary paper matching this description and year is:
3.1. Experimental Setup for Triangle Analysis 3.2. Case Study 2009: Applications in Engineering index of triangle 2009 link
: Research by X. Li and J. Liu (2009) confirmed a conjecture regarding the Randić index of triangle-free graphs with a specific minimum degree. index of triangle 2009 The phrase "" typically
(Hypothetical Example Based on Generic Research Report Structure) index of triangle 2009 link