<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>Re: End of infinite sequence</TITLE>
</HEAD>
<BODY>
<DIV id=idOWAReplyText52926 dir=ltr>
<DIV dir=ltr> </DIV></DIV>
<DIV dir=ltr><FONT size=2>Hello Maximilian,</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>> In every existing encyclopedia, choices must be
made</FONT></DIV>
<DIV dir=ltr><FONT size=2>></FONT><FONT size=2> and are made on what to
include, and what to omit</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>... yes, I think this has been already discussed
before ;-)</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>> there's so much arbitraryness in that
definition...<BR></FONT></DIV>
<DIV dir=ltr><FONT size=2>... yes, I fully agree, but... Three
remarks:</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>- I have a rather known predecessor who proved a few
inte-</FONT></DIV>
<DIV dir=ltr><FONT size=2>resting </FONT><FONT size=2>things by means of words
transformed into integers,</FONT></DIV>
<DIV dir=ltr><FONT size=2>and even by long (german) statements transformed into
single</FONT></DIV>
<DIV dir=ltr><FONT size=2>(huge) integers, and (also) by means of
self-referentiality;</FONT></DIV>
<DIV dir=ltr><FONT size=2>- "mathemagicians", have to re-enchante the
world; show this</FONT></DIV>
<DIV dir=ltr><FONT size=2>sequence to some youngsters -- you will see how
</FONT><FONT size=2>their eyes </FONT></DIV>
<DIV dir=ltr><FONT size=2>will soon blink, how their smiles will
open after a few words</FONT></DIV>
<DIV dir=ltr><FONT size=2>of explanation. Self-reference is always fun, tricky,
weird.</FONT></DIV>
<DIV dir=ltr><FONT size=2>I guess the OEIS is there for that
too;</FONT></DIV>
<DIV dir=ltr><FONT size=2>- The same remark (to re-enchante the times) is valid
for </FONT></DIV>
<DIV dir=ltr><FONT size=2>infinite sequences "having no </FONT><FONT
size=2>start" but a precise end. Do </FONT></DIV>
<DIV dir=ltr><FONT size=2>you know many of those? Show </FONT><FONT size=2>the
problem the other way </FONT><FONT size=2>round </FONT></DIV>
<DIV dir=ltr><FONT size=2>to those youngsters (if they </FONT><FONT size=2>are
still there): "Could you</FONT></DIV>
<DIV dir=ltr><FONT size=2>folks figure out an infinite se</FONT><FONT
size=2>quence -- by the left?" They</FONT></DIV>
<DIV dir=ltr><FONT size=2>will probably say it is impos</FONT><FONT size=2>sible
-- the smartest ones </FONT></DIV>
<DIV dir=ltr><FONT size=2>hopefully reversing an existing OEIS seq (as I stated
in my</FONT></DIV>
<DIV dir=ltr><FONT size=2>very first post).</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>So, I've sent this seq to the list hoping to raise
half a</FONT></DIV>
<DIV dir=ltr><FONT size=2>smile somewhere, </FONT><FONT size=2>and give some
stuff to present (or future) </FONT></DIV>
<DIV dir=ltr><FONT size=2>imaginative "mathemagician </FONT><FONT
size=2>teachers". </FONT><FONT size=2>We must share our </FONT></DIV>
<DIV dir=ltr><FONT size=2>enthousiam for math -- and I think </FONT><FONT
size=2>this </FONT><FONT size=2>"arbitrary", "chan-</FONT></DIV>
<DIV dir=ltr><FONT size=2>ging with time", "concatenated", "dis</FONT><FONT
size=2>carding", "english/</FONT></DIV>
<DIV dir=ltr><FONT size=2>latin" </FONT><FONT size=2>sequence is, well... nice,
in a crtain way ;-)</FONT></DIV>
<DIV dir=ltr><FONT size=2>(showing how the seq. can be "translated" in other
languages</FONT></DIV>
<DIV dir=ltr><FONT size=2>is of interest also, no? I have a french and an
italian </FONT></DIV>
<DIV dir=ltr><FONT size=2>version available for </FONT><FONT size=2>anyone
interested ;-)</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>My two re-enchanted cents.</FONT></DIV>
<DIV dir=ltr><FONT size=2>E.</FONT></DIV>
<DIV dir=ltr><FONT size=2>[this sequence has been tested on fully aware and
accepting</FONT></DIV>
<DIV dir=ltr><FONT size=2>teenagers; none </FONT><FONT size=2>of them has been
hurt; all European laws</FONT></DIV>
<DIV dir=ltr><FONT size=2>about student working hours and student overtime have
been</FONT></DIV>
<DIV dir=ltr><FONT size=2>respected. All characters except Kurt Gödel and the
two Maxes</FONT></DIV>
<DIV dir=ltr><FONT size=2>are fictive. Music (directed and composed by CPU &
Fan) <FONT size=2>is </FONT></FONT></DIV>
<DIV dir=ltr><FONT size=2><FONT size=2>available at </FONT><FONT
size=2>Amazon.com. Computed on location in Brussels,</FONT></FONT></DIV>
<DIV dir=ltr><FONT size=2>Belgium. This mail can be reproduced anytime anywhere
in </FONT><FONT size=2>part </FONT></DIV>
<DIV dir=ltr><FONT size=2>or in </FONT><FONT size=2>full -- having in mind it
weights 0,037 ECMT (Equivalent</FONT></DIV>
<DIV dir=ltr><FONT size=2>Carbon Metric Ton)]</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr>
<HR tabIndex=-1>
</DIV>
<DIV dir=ltr><FONT face=Tahoma size=2><B>De:</B> Maximilian Hasler
[mailto:maximilian.hasler@gmail.com]<BR><B>Date:</B> mar. 05/06/2007
18:36<BR><B>Ā:</B> Eric Angelini<BR><B>Cc:</B> seqfan@ext.jussieu.fr<BR><B>Objet
:</B> Re: End of infinite sequence<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>"Of course" Max's reply is in principle the right method to code
a<BR>sequence that is "infinite into the negative direction".<BR>However,
personally I frown a bit upon the fundamentalness of that sequence.<BR>Chosing
the English language (orthography of which is "arbitrary" and<BR>changing with
time) and the "latin" alphabet (which is itself changing<BR>in
time),<BR>deciding to concatenate letters of words like twenty-two
(i.e.<BR>discarding spaces and/or dashes, contrary to the written
definition<BR>which takes up 4 lines...), but putting 0 for an inter-word
space<BR>resp. comma, ...<BR>there's so much arbitraryness in that
definition...<BR>In every existing encyclopedia, choices must be made and are
made on<BR>what to include, and what to omit....<BR><BR>M.H.<BR><BR>On 6/5/07,
Max Alekseyev <maxale@gmail.com> wrote:<BR>> On 6/5/07, Eric Angelini
<Eric.Angelini@kntv.be> wrote:<BR>> ><BR>> > Hello
Seq-fans,<BR>> > this is the end of an infinite sequence (no start,
infinite<BR>> > amount of terms, but a precise end):<BR>> ><BR>>
> ... 20,23,5,14,20,25,20,23,15,0,6,9,22,5.<BR>> ><BR>> > How
could I enter such a sequence in the OEIS?<BR>><BR>> Why not reverse the
order and turn it into a regular sequence:<BR>><BR>> 5, 22, 9, 6, 0, 15,
23, ...<BR>><BR>> ?<BR>><BR>>
Max<BR>><BR></FONT></P></DIV>
</BODY>
</HTML>