 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2021/iii/paper-205/2/a/solution

For

s = ∣ S ∣ > 0

, the compatibility constant in the convention used here is

ϕ_{Σ}^{2} (S) = s in f {δ^{T} Σ δ : ∥ δ_{S} ∥_{1} = 1, ∥ δ_{S^{c}} ∥_{1} \leq 3} .

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