Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!mips!sgi!karsh@trifolium.esd.sgi.com
From: karsh@trifolium.esd.sgi.com (Bruce Karsh)
Newsgroups: comp.dsp
Subject: Re: 180 deg phase shift
Message-ID: <103151@sgi.sgi.com>
Date: 10 May 91 20:11:36 GMT
References: <1991May9.160115.3494@cpsc.ucalgary.ca> <1991May09.192740.4165@bmerh2.bnr.ca> <1991May10.153753.22596@njitgw.njit.edu>
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Reply-To: karsh@trifolium.sgi.com (Bruce Karsh)
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 14

In article jfa0522@hertz.njit.edu (john f andrews ece) writes:

>Why do we keep tagging onto this thread? "any signal ..with a fourier
>ransform" implies any periodic signal....so why the beef? Let it go!

Because what you said is wrong.  It is simply not the case that the
existence of a Fourier transform of a function or a series implies periodicity.

The existence of a Fourier sequence implies periodicity, but that is another
matter.  The Fourier transform exists for non-periodic functions which are
absolutely summable.

			Bruce Karsh
			karsh@sgi.com