Equation 12.6.20269EE4BAAD07

\begin{equation} \begin{gathered} \widehat A_\varepsilon =a\operatorname {diag}(\varepsilon ^{-1/3},\varepsilon ^{-1/3},\varepsilon ^{2/3}),\\ d_ S(A_\star ,\widehat A_\varepsilon )=\frac{\sqrt2}{3}|\log \varepsilon |. \end{gathered} \end{equation}