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 Apr17 awarded Popular Question Feb7 awarded Famous Question Sep5 awarded Popular Question Jul2 awarded Curious Jul2 awarded Inquisitive Jun23 accepted Is Minimax equals to Maximin? Jun20 revised Is Minimax equals to Maximin? added 1 character in body Jun20 asked Is Minimax equals to Maximin? Jun20 accepted Effect of doubly stochastic matrix on vector norm Dec14 awarded Yearling Sep25 asked Estimating/Reconstructing the distance matrix by given pairwise distance of a subset of points Aug22 comment Are matrix p-norms unitary invariant? Thanks very much its a very nice answer ! Aug22 accepted Are matrix p-norms unitary invariant? Aug16 comment Are matrix p-norms unitary invariant? @JyrkiLahtonen Sorry I forget to compute it on an arbitrary case first. Its not unitary invariant. I will close this question. Aug16 asked Are matrix p-norms unitary invariant? Jul18 accepted Derivative of $f(x) = e^{a^Tx}$ Jul17 comment Derivative of $f(x) = e^{a^Tx}$ @GitGud Updated. Thanks for your correction :) Jul17 revised Derivative of $f(x) = e^{a^Tx}$ added 26 characters in body Jul17 comment Derivative of $f(x) = e^{a^Tx}$ @GitGud May I know what are the differences? Jul17 comment Derivative of $f(x) = e^{a^Tx}$ @MonkeyD.Luffy Sorry $T$ is transpose notation. $a$ and $x$ are vectors.