Yes, sinc(x) is non-negative definite, because its Fourier Tran

来源: 于 2015-03-07 06:42:57 [旧帖] [给我悄悄话] 本文已被阅读：次

Yes, sinc(x) is non-negative definite, because its Fourier Transform, FT(sinc(x)), is non-negative.

If it sounds "joke" to you, you need to dust off your math textbook.

:)