We find the greatest value and the least value in such that the double inequality holds for all with . Here, 2 arctan and are the Seiffert and contraharmonic means of and , respectively.
"Sharp Bounds for Seiffert Mean in Terms of Contraharmonic Mean." Abstr. Appl. Anal. 2012 (SI12) 1 - 6, 2012. https://doi.org/10.1155/2012/425175