Ando [1] proved that for m commuting positive definite matrices, the m-fold Hadamard product of their geometric mean is bounded above by their Hadamard product. We obtain a natural extension to the non-commutative case.
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Univ Regina, Dept Math & Stat, Regina, SK S4S 0A2, CanadaUniv Regina, Dept Math & Stat, Regina, SK S4S 0A2, Canada
Fallat, Shaun
Johnson, Charles R.
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Coll William & Mary, Dept Math, Williamsburg, VA 23187 USAUniv Regina, Dept Math & Stat, Regina, SK S4S 0A2, Canada
Johnson, Charles R.
Sokal, Alan D.
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NYU, Dept Phys, 4 Washington Pl, New York, NY 10003 USA
UCL, Dept Math, London WC1E 6BT, EnglandUniv Regina, Dept Math & Stat, Regina, SK S4S 0A2, Canada