“Bessel inequality”的概念、定义、翻译、参考文献-科学参考

单词	Bessel inequality
释义	Bessel inequality [`bes·ǝl ´in·ē`kwäl·ǝd·ē] ^MATHEMATICS The statement that the sum of the squares of the inner product of a vector with the members of an orthonormal set is no larger than the square of the norm of the vector.
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