:)))

FT(sinc(x)) becomes zero at lots of points, isn't it?
　
来源: career 于 2015-03-07 07:06:36 [档案] [转至博客] [旧帖] [给我悄悄话] 本文已被阅读：1 次 (53 bytes)
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回答: Bochner calls it "positive definite", not "NND". Get a better te 由 weston 于 2015-03-07 06:56:21
So it's non-negative definite.

:)