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→Second-order cones: being semidefinite is not a linear constraint - nomenclature is confusing, give the definition |
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:<math>||x||\leq t \Leftrightarrow \begin{bmatrix} tI & x \\ x^T & t \end{bmatrix} \succcurlyeq 0,</math>
i.e., a second-order cone constraint is equivalent to a [[linear matrix inequality]]
:<math>\mathbf{x}^\mathsf{T} M\mathbf{x} \geq 0 \text{ for all } \mathbf{x} \in \mathbb{R}^n</math>.
Similarly, we also have,
:<math>\lVert A_i x + b_i \rVert_2 \leq c_i^T x + d_i \Leftrightarrow
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