Eric/Novice Delirium Post

[Maximilian Hasler]

Just to clarify:

On Sat, Mar 29, 2008 at 3:25 PM, Eric <moongerms at wanadoo.fr> wrote:
> (...) and above all:  say nothing
>  if i'm not oblige to quit the list.

This is not exactly what I said... ;-)

On Sat, Mar 29, 2008 at 10:06 AM, Maximilian Hasler wrote:
> Dear Eric,
>
>  the only "clear"(?) mathematical question/fact I can make out in this
>  post is the following:
>  If you want to have standing waves of different wavelengths,
>  the length of the recipient must indeed be a multiple of these
>  wavelengths (halved).
>  e.g.
>  lambda_1 = 3 cm
>  lambda_2 = 5 cm
>  => recipient's length must be a multiple of   lcm(15mm,25mm)
>   = LCM( 3; 5 ) * 0.5cm    = 15 * 0.5 cm = 7.5 cm
>  (LCM = least common multiple = PPCM, plus petit commun multiple)
>
>  here we have the product of 3 and 5 since these are relatively prime
>  but if you have e.g. 4 and 6 the LCM is 12.
>
>  It's the same as with your previous 0001... pattern
>  except there one always has n and n-1 which are always relatively
>  prime so the LCM is at least n(n-1) (maybe bigger if there are more numbers)
>
>  *** But please note: ***
>  most people subscribe to this list since they are interested in "true"
>  mathematical problems. And some of them receive lots of other mail and
>  have lots of other things to do.
>  If there are too many "novice delirium posts", then people who could
>  make interesting contributions to challenging questions will sooner or
>  later cancel their subscription, which would not be good for the
>  quality standard of OEIS.
>
>  Did you already consider posting on some other lists on mathematics ?
>  Or rather "forums", seem more appropriate for this kind of question.
>  (There are many such forums: I can suggest you some if you cannot find
>  appropriate ones on internet.)
>
>  Thanks for considering also the problems of other people.
>
>  Regards,
>  Maximilian