Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » alt.math.recreational.independent

Topic: All Integers are Interesting (with Proof)
Replies: 1   Last Post: Apr 24, 2005 6:24 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View  
Large_Nassau_Grouper@Yahoo.com

Posts: 2,083
Registered: 2/11/05
Re: All Integers are Interesting (with Proof)
Posted: Apr 24, 2005 6:24 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply


Jim Spriggs wrote:
> Reef Fish wrote:
> >
> > ...
> >
> > Actually, that statement can only be PROVED if the number is an
> > INTEGER.
> >
> > Proof:
> >
> > We proceed by the method of reductio ad absurdum
> >
> > Suppose the set U of un-interesting integers is non-empty. Then,

since
>
> You need to say _positive_ integers, else U can be
>
> {-1, -2, -3, -4, ...}


Thank you for your interest in the subject. ;-) Yes, U can be any
negative integers too. Nothing in the proof below assumes U or u to
be positive integers only.

If the smallest "un-interesting integer" is -12345679, or any other
negative integer, the proof still holds.

>
> > it is a set of integers, there is a least member of U, u, say. u
has
> > the property of being the smallest un-interesting integer, which is
> > interesting --- a logical contradiction. Thus we have disproved

the
> > hypothesis that U is non-empty, hence empty. The set of
un-interesting
> > integers is empty means there are no un-interesting integers.
> >
> > QED.
> >
> > -- Bob.


-1 is certainly an interesting integer. The square root of -1 takes
you
from the real domain to the complex domain is just one of the
"interesting"
facts about it. :-)

-25,361,761 is interesting because ... according to the Guiness Book
...

The largest slot machine payout is $39,713,982.25 (£25,361,761), won
by
a 25-year-old software engineer (hence -25,361,761 won by the slot
machine <g>) from Los Angeles after putting in $100 (£64) in the
Megabucks slot machine at the Excalibur Hotel-Casino (pictured),
Las Vegas, Nevada, USA, on March 21, 2003

-- Bob.





Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.