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On Bessel and Gruss Inequalities for Orthornormal Families in Inner Product Spaces

Sever Silvestru Dragomir
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Abstract

A new counterpart of Bessel's inequality for orthornormal families in real or complex inner product spaces is obtained. Applications for some Gruss type results are also provided.

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Sever Silvestru Dragomir. 2003-05-20. On Bessel and Gruss Inequalities for Orthornormal Families in Inner Product Spaces. https://arxiv.org/abs/math/0305295

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