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