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Authors: SILVESTRU SEVER DRAGOMIR.
DOI: 10.24193/subbmath.2021.2.13
Published Online: 2021-06-15
Published Print: 2021-06-30
pp. 381-395
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In this paper we obtain some additive inequalities related to the celebrated Bessel’s inequality in inner product spaces. They complement the results obtained by Boas-Bellman, Bombieri, Selberg and Heilbronn, which have been applied for almost orthogonal series and in Number Theory.
Mathematics Subject Classification (2010): 46C05, 26D15.
Keywords: Inner product spaces, Bessel’s inequality, Schwarz’s inequality.
