Audenaert, Koenraad (2011) A characterisation of anti-Loewner functions. Proceedings of the American Mathematical Society, 139
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In this paper we answer a question of R. Bhatia, by providing a characterisation of real-valued functions $g$ defined on $[0,+\infty]$ for which the matrix $(\frac{g(x_i)+g(x_j)}{x_i+x_j})_{i,j=1}^N$ is positive semidefinite, for every integer $N>0$ and any choice of $x_1,x_2,\ldots,x_N \in (0,+\infty)$.
This is a Submitted version This version's date is: 2011 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/85313d67-0f21-2ed0-3400-699d0ef970e9/1/
Deposited by Research Information System (atira) on 29-Aug-2012 in Royal Holloway Research Online.Last modified on 29-Aug-2012