Am Montag, 27. Oktober 2008 12:35 schrieb Achim Schneider:
> Daniel Fischer <[EMAIL PROTECTED]> wrote:
> > Am Montag, 27. Oktober 2008 11:46 schrieb Henning Thielemann:
> > > I also know a didact which tells teachers that 1 has no prime
> > > decomposition. Oh, I see, she may have copied that from Wikipedia:
> > >     http://en.wikipedia.org/wiki/Prime_factorisation
> >
> > I can believe that makes sense to somebody who considers 0 an
> > unnatural number, an empty product must be frightening for them.
>
> That is just mathematical trickery and dodgery, silently defining 1 as
> prime by including it (even infinitely many times!) in any prime
> factor,

Who does such horrible things?
Repeat after me: 1 is NOT a prime. Never, under no circumstances.

> denying its existence there (by defining all units to be
> non-prime) and then calling the whole algebra paradox-free, hoping that
> noone notices.

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