[seqfan] Re: A222200

[Neil Sloane]

PS

In English one normally says "Hamiltonian cycle", not "Hamilton cycle".
(Hamiltonian is the traditional name, and somehow it sounds better in
English - in German it may be different)

Anyway, I have done some global edits to change to "Hamiltonian" in most
places in the OEIS database.

(I don't know how to make global edits to the wiki side)


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



On Tue, Jan 1, 2019 at 5:10 PM Neil Sloane <njasloane at gmail.com> wrote:

> Dear Robert,  Thank you for trying!  Of course I understand his point of
> view, there are many tables of my own which I no longer actively support.
>
> Although I do not delete them until there is something better on the
> Internet.
>
> I have gone though all the links to his pages (I think)  and I replaced
> them with the link that you found to the "archive" (the way-back machine).
> That is much better than just having a "broken link".
>
> 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
>
>
>
> On Tue, Jan 1, 2019 at 4:53 PM Robert FERREOL <robert.ferreol at gmail.com>
> wrote:
>
>>
>> Le 31/12/2018 à 08:31, Neil Sloane a écrit :
>>
>> Robert,  Could you please write to him, and tell me what you find?
>>
>>
>> Unfortunately Peter Tittmann has deleted his pages and does not intend to
>> republish them "" I was expecting other groups to surpass us and so I
>> deleted the old websites. "
>>
>> I am going to find other links for https://oeis.org/A222200
>>
>> His answer :
>>
>> Lieber Robert Ferréol,
>>
>> ich freue mich über Ihr Interesse an diesem Thema. Die von Ihnen
>> gefundenen Ergebnisse sind schon mehr als 15 Jahre alt. Ich hatte erwartet,
>> dass andere Gruppen uns längst überholt haben und deshalb die alten
>> Webseiten entfernt. Die Methode der Berechnung beruht auf Wegzerlegungen
>> von Graphen. Die Grundlagen dazu sind in der Dissertation meines ehemaligen
>> Forschungsstudenten, André Pönitz, zu finden:
>>
>>
>> http://www.qucosa.de/fileadmin/data/qucosa/documents/2080/MathematikPXnitzAndrX756952.pdf
>>
>> Prinzipiell ist das Problem der Zählung von Hamiltonkreisen einfach (in
>> Polynomialzeit lösbar) in Graphen beschränkter Baumweite (bounded treewidth
>> graphs). Die eigentliche Kunst der Methode besteht im (schnellen)  Finden
>> einer (sub-) optimalen Baum- oder Wegzerlegung eines Graphen. Zu diesem
>> Thema bieten die Webseiten von Hans Bodlaender viel Material:
>>
>> http://www.cs.uu.nl/research/techreps/aut/hansb.html
>> Ich hoffe, dass ich Ihnen mit diesen Hinweisen helfen konnte.
>>
>> The ideal would be to get a replacement link.  Or,
>> ask for a copy of the original and permission to put it on the OEIS web
>> site.
>> We have to do this all the time, we have 400,000 links in the OEIS
>> and every day several of them die.
>>
>> Here are his coordinates:
>>
>> Peter Tittmann
>> Hochschule Mittweidapeter at hs-mittweida.dehttps://www.cb.hs-mittweida.de/index.php?id=peter
>>
>> 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
>>
>>
>>
>> On Mon, Dec 31, 2018 at 2:13 AM Robert FERREOL <robert.ferreol at gmail.com> <robert.ferreol at gmail.com>
>> wrote:
>>
>>
>> Hello,
>>
>> Can we find the dead link from peter Tittmann :https://www.staff.hs-mittweida.de/~peter/research/enumeration.html shown
>> on https://oeis.org/A222200 ?
>>
>> thanks
>>
>>
>> --
>>
>>
>>
>> ROBERT FERRÉOL
>> 6, Rue des Annelets 75019 PARIS
>> 01 42 41 91 98 http://mapage.noos.fr/r.ferreolhttps://www.facebook.com/mathcurve
>> maths, ex mpsi Fénelon Paris
>>
>>