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
»
sci.math.*
»
sci.math.independent
Topic:
How do you prove that 2+2=4? Is it enough to consider 2 objects,
then 2 more then put them together and count them and get 4, or do you have
to resort to fancy-schmancy methods?
Replies:
8
Last Post:
Nov 18, 2012 7:45 PM
|
 |
|
|
|
Re: How do you prove that 2+2=4? Is it enough to consider 2 objects,
then 2 more then put them together and count them and get 4, or do you have
to resort to fancy-schmancy methods?
Posted:
Nov 16, 2012 12:06 AM
|
|
On Nov 15, 11:22 pm, donstockba...@hotmail.com wrote:
> Just askin.
Principia Mathematica BS says it takes 100 pages. I don't know
anybody who has tried to explain what is going on there (everyone just
sits in awe at the number of pages), but Peano Arithmetic proves it in
a few steps where 2 is 0'' and 4 is 0'''', based on the axioms x+0=x
and x+y' = (x+y)' where x' is x+1 ("successor of x").
C-B
|
|
|
|
