Re: Mathworld errors

From: David W. Cantrell (DWCantrell_at_sigmaxi.org)
Date: 11/29/04 

Date: 29 Nov 2004 14:38:47 -0800

David C. Ullrich <ullrich@math.okstate.edu> wrote:
> I just got an email
>
> From: Ed Pegg Jr <edp@wolfram.com>
>
> inviting me to send him a list of errors on mathworld.
> I haven't saved such a list, thought I'd mention this
> in case anyone else has.
>
> >Dear David Ullrich,
> >
> >Recently, on sci.math, you mentioned:
> >
> ><<Well, yes - given that you're the kind of guy people might tend
> >to believe, you might at least include a question mark or
> >something...
> >
> >(Today must be your first visit to mathworld - it's really full of
> >errors. I admit this is a good one.)>>
> >
> >If you would be so kind as to send us a list, Eric and I will be
> >glad to fix them.

I have kept lists of errors, and used to submit them to Eric every once in
a while. But it eventually became apparent to me that I could spend a
large part of my life doing nothing but correcting MathWorld errors...

As it happens, the "good one" mentioned above was on my list of errors yet
to be submitted, so that's one I can remove from the list. Just for the
heck of it, I decided to take care of the last four errors on the list
now. Well, the last one, which concerned an equation in the entry "Triangle
Wave", seems to have been taken care of already, so here are the remaining
three:

1) In <http://mathworld.wolfram.com/CardinalFunction.html>, the reference

Whittaker, J. M. "On the Cardinal Function of Interpolation Theory." Proc.
Edinburgh Math. Soc. 2, 41-46, 1927.

is slightly incorrect. (The mistake seems to have been copied from the
reference in the paper by McNamee et al.) Instead of volume 2, it should
be series 2, volume 1.

2) In <http://mathworld.wolfram.com/RadiusofCurvature.html>

absolute values are needed in the denominators.

3) In <http://mathworld.wolfram.com/CasusIrreducibilus.html>

the correct spelling is "casus irreducibilis", rather than "...lus".

[A copy of this post has been sent to Ed Pegg.]

David W. Cantrell

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