Abstract
Let x 1,...,x n be vectors of a unitary space X. Then
is called the Gram matrix of the vectors x 1,...,x n .
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Mitrinović, D.S., Pečarić, J.E., Fink, A.M. (1993). Gram’s Inequality. In: Classical and New Inequalities in Analysis. Mathematics and Its Applications (East European Series), vol 61. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1043-5_20
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