Signed mean value trace inequalities for Hermitian matrices
Let be Hermitian matrices, let be a positive integer, and let . For a Hermitian matrix , write and for its positive and negative parts, and write for its absolute value. Signed mean value trace inequalities. The following inequalities should hold:
and
These inequalities would provide the missing ingredient for extending the paper's concentration method to matrix self-bounding functions. The source presents them as needed for that analysis, but gives no resolution, so their status remains open.
References
Primary source
Daniel Paulin, Lester Mackey and Joel A. Tropp, “Deriving Matrix Concentration Inequalities from Kernel Couplings”, arXiv:1305.0612 (2013).
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