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Matricesmedium
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Hadamard's inequality states that for an n×nn\times nn×n matrix AAA with columns c1,…,cn\mathbf{c}_1, \ldots, \mathbf{c}_nc1​,…,cn​: ∣det⁡(A)∣≤∥c1∥⋅∥c2∥⋯∥cn∥|\det(A)| \leq \|\mathbf{c}_1\| \cdot \|\mathbf{c}_2\| \cdots \|\mathbf{c}_n\|∣det(A)∣≤∥c1​∥⋅∥c2​∥⋯∥cn​∥ Which statement about equality in Hadamard's inequality is correct?