In this paper, we present an extension of Kantorovich inequality for two operators on a Hilbert space. Also, the multiple version and a related inequality for positive linear maps are obtained. Moreover, we introduce the concept of Specht's ratio and improve some inequalities related to Specht's ratio.
The authors would like to thank the referees for their useful comments.
"An extension of the operator Kantorovich inequality." Tbilisi Math. J. 13 (4) 183 - 191, December 2020. https://doi.org/10.32513/tbilisi/1608606057