Annals of Mathematics, Second Series, Vol. 176, No. 3 (November, 2012), pp. 1783-1826 (44 pages) We prove generalizations of Löwner's results on matrix monotone functions to several variables. We give ...
Transactions of the American Mathematical Society, Vol. 366, No. 6 (JUNE 2014), pp. 3043-3074 (32 pages) The new notion of operator/matrix k-tone functions is introduced, which is a higher order ...
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