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A counter-example to lower bounds for the singular values of the sum of two matrices in [1] and [2] is given.
R.A. Horn, C.R. Johnson, Topics in Matrix Analysis, Cambridge University Press, 1991
1991
Earlier work this paper cites.
A.W. Marshall, I. Olkin, B.C. Arnold, Inequalities: Theory of Majorization and Its Applications, Springer, New York, 2011
2011
Cited alongside, same era.
F. Zhang, Matrix Theory, Springer, New York, 2011
2011
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