[Haskell-cafe] Re: Why 'round' does not just round numbers ?

[Achim Schneider]

Daniel Fischer <daniel.is.fischer at web.de> wrote:

> Am Montag, 27. Oktober 2008 12:35 schrieb Achim Schneider:
> > Daniel Fischer <daniel.is.fischer at web.de> 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.
> 
Then chase it out of your prime factor products. You'd be the first one
to break a monoid and locate unsafeCalculate#.

-- 
(c) this sig last receiving data processing entity. Inspect headers
for copyright history. All rights reserved. Copying, hiring, renting,
performance and/or quoting of this signature prohibited.