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Nonlinear objectives, nonlinear constraints, non-convex objective, non-convex feasible region.
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A (reverse)-Minkowski type inequality for symmetric sums
Let $(u_1, u_2, u_3, u_4)$ and $(v_1, v_2, v_3, v_4)$ be vectors in $\mathbb R_+^4$. Is the following inequality true?
\begin{align*}
\left(\sum_{{[4] \choose 3}} \sqrt{u_i u_j u_k}\right)^{2/3} + \ …