[seqfan] Re: triple vs triplet

[Reinhard Zumkeller]

It might also be worth to consider a quadruplet: then there are C(4,3) = 4
subsets of three children with the mentioned attributes which are not
triplets. Isn't it?
Best
Reinhard

2015-10-23 21:22 GMT+02:00 Harvey P. Dale <hpd at hpdale.org>:

> Neil:
>
>           There are three families, unrelated to each other, living at 100
> Main Street, Metropolis, USA.  They each have the same last name.  Each
> family had one child born on the same day.  Are they triplets? ☺
>
>           I would have thought the definition, in lieu of “same last
> name,” would have been “same mother” and I suppose that even if one, but
> not all, of the children later moved to another address their triplet
> status would persevere? ☺
>
>           Best,
>
>           Harvey
>
>
>
> -----Original Message-----
> From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil
> Sloane
> Sent: Friday, October 23, 2015 11:28 AM
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Subject: [seqfan] Re: triple vs triplet
>
>
>
> The convention in the OEIS is that "triple" is the preferred term
>
>
>
> "triplets" are three children with the same last name, the same address,
> and the same birthday
>
>
>
>
>
>
>
> Best regards
>
> Neil
>
>
>
> Neil J. A. Sloane, President, OEIS Foundation.
>
> 11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
>
> Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
>
> Phone: 732 828 6098; home page: http://NeilSloane.com
>
> Email: njasloane at gmail.com<mailto:njasloane at gmail.com>
>
>
>
>
>
> On Fri, Oct 23, 2015 at 10:51 AM, Craig Knecht <craigknecht03 at gmail.com
> <mailto:craigknecht03 at gmail.com>>
>
> wrote:
>
>
>
> > Is there any definition for a triple vs a triplet?  I have a structure
>
> > where I would like to call a linear arrangement of 3 values a triple
>
> > and a elementary triangle arrangement of the values a triplet (
>
> > Structure =  a triangle tiled with Pythagorean triplets and triples ..
> see attachment).
>
> >
>
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