# [seqfan] Re: Meanings

Charles Greathouse charles.greathouse at case.edu
Tue Dec 13 15:04:38 CET 2011

```Best, of course, is not to use them with multiple meanings at all.

When it cannot be avoided, or is actually used in the literature with
multiple meanings, I recommend following the OEIS use of the word
"powerful" where numerals are appended: cf. A001694, A007532.  (In
that case it's unfortunate that A007532 were given that name, since
A001694 is really the only meaning ever referenced...)

Charles Greathouse
Analyst/Programmer
Case Western Reserve University

On Tue, Dec 13, 2011 at 4:57 AM, Paolo Lava <paoloplava at gmail.com> wrote:
> Dear seqfans,
>
> What to do when the same word is used with different meanings? To take the
> oldest definition as the right one or leave all the definitions as they are?
>
>
>
> For instance let us take the term “anti-perfect”.
>
>
>
> I extensively used it in many sequences (see A192270, A192271, A192275,
> A192285, A192288, A192290, A192293) trusting in the definition given by Jon
> Perry: integers such that the sum of its anti-divisors equals the original
> integers (A073930; the link does not work: see a cached copy on
> anti-divisor in http://oeis.org/A066272/a066272a.html)
>
>
>
> But if we look at A072228 Joseph L. Pe defines anti-perfect the numbers n
> such that n = the sum of the reverses of the proper divisors of n.
>
>
>
>  <http://oeis.org/A024816>
>
> Furthermore in a comment to A159907 Jaroslav Krizek writes: “…
> multiply-anti-perfect numbers m: m divides antisigma(m) = A024816(m)…”
>
> <http://oeis.org/A024816>
>
>
>
> Paolo
>
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>
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