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Paper Title:
Some Operator Order Inequalities for Continuous Functions of Selfadjoint Operators in Hilbert Spaces
Author(s):
S. S. Dragomir1,2 and Charles E. M. Pearce3
1Mathematics, School of Engineering & Science,
Victoria University,
PO Box 14428,
Melbourne City, MC 8001,
Australia.
2School of Computational & Applied Mathematics,
University of
the Witwatersrand,
Private Bag 3, Johannesburg 2050,
South Africa.
sever.dragomir@vu.edu.au
URL: http://rgmia.org/dragomir
3School
of Mathematical Sciences,
The University of Adelaide,
Adelaide,
Australia
Abstract:
Various bounds in the operator order for the following operator transform
where A is a selfadjoint operator in the Hilbert space H with the
spectrum Sp( A) ⊆ [ m,M]
and f:[m,M] -> C is a continuous function on [m,M]
are given. Applications for the power and logarithmic functions are provided as
well.
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