# Discuss the bessel's inequality for finite dimensional space

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In mathematics, especially functional analysis, Bessel's inequality is a statement ... in a Hilbert space with respect to an orthonormal sequence. The inequality ... Finite- Dimensional. ·

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In mathematics, especially functional analysis, Bessel's inequality is a statement about the coefficients of an element {\displaystyle x} x in a Hilbert space with respect to an orthonormal sequence. The inequality was derived by F.W. Bessel in 1828.

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