Each of the following properties is known to be a sufficient condition for an amenable function to be metric-preserving [10,11]: f is concave; f is nondecreasing and subadditive; f is tightly bounded (that is, there exists a > 0 such that f x ∈ a , 2 a for every x > 0 ). Fo...
2 Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL 33612, USA; E-Mail: szhou@health.usf.edu 3 University Institute of Pharmacy, Pt. Ravishankar Shukla University, Raipur 492 010, India; E-Mails: manjursu@gmail.com (M.R.S.); deependraiop@...