RT Journal Article T1 New results on the harmonic index and its generalizations A1 Rodríguez García, José Manuel A1 Sigarreta Almira, José María AB In this paper we obtain new inequalities involving the harmonic index and the(general) sum-connectivity index, and characterize graphs extremal with respect tothem. In particular, we improve and generalize some known inequalities and werelate this indices to other well-known topological indices. PB MATCH SN 0340-6253 YR 2017 FD 2017 LK https://hdl.handle.net/10016/33870 UL https://hdl.handle.net/10016/33870 LA eng NO The authors are grateful to the referees for their valuable comments which have improved this paper. This work is supported in part by two grants from Ministerio de Economía y Competititvidad (MTM2013-46374-P and MTM2015-69323-REDT), Spain, and a grant from CONACYT (FOMIX-CONACyT-UAGro 249818), México. DS e-Archivo RD 27 jul. 2024