# Timeline for Concavity of Conditional Quantum Entropy

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Aug 26 '21 at 12:24 answer timeline score: 1
Aug 26 '21 at 12:07 comment The last inequality isn't true. If $S((1 - \epsilon)\rho_2 + \epsilon\sigma_2) \ge (1 - \epsilon)S(\rho_2) + \epsilon S(\sigma_2)$, then the inequality on the last line should be $\le$
Aug 25 '21 at 22:05 history edited glS
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Aug 25 '21 at 17:42 history asked