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This post will state a couple forms of the Cauchy-Schwarz inequality and then present the lesser-known reverse of the Cauchy-Schwarz inequality due to Pólya and Szegö. Cauchy-Schwarz inequality The summation form of the Cauchy-Schwarz inequality says that for sequences of real numbers xn and yn. The integral form of the Cauchy-Schwarz inequality says that for […] The post Reversed Cauchy-Schwarz inequality first appeared on John D. Cook....