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Christopher Albert edited this page Jul 23, 2024 · 1 revision

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The Cauchy-Schwarz Inequality

$$ \left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right) $$