Subject: Re: LISP routines to do symbolic differentiation
From: (Rob Warnock)
Date: Mon, 02 Feb 2004 05:29:49 -0600
Newsgroups: comp.lang.lisp
Message-ID: <>
Joe Marshall  <> wrote:
| Richard Fateman <> writes:
| > There are functions that are zero except at an infinite number of points.
| That's a rather broad exception.

I suspect Fateman may have been referring to some particularly weird
functions of measure zero, that is, whose integrals are zero over any
finite interval, yet which also contain an infinite number of non-zero
values over any finite interval, yet no value is negative. [We had to
construct some in my sophomore topology seminar (long, long ago)...]


Rob Warnock			<>
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