Complementary inequalities. I: Inequalities complementary to Cauchy’s inequality for sums of real numbers. II: Inequalities complementary to the Buniakowsky-Schwarz inequality for integrals. III: Inequalities complementary to Schwarz’s inequality in Hilbert space. (English) Zbl 0135.34702

J. Math. Anal. Appl. 9, 59-74, 278-293 (1964); Math. Ann. 162, 120-139 (1965).

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