Search All of the Math Forum:

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

Topic: Matheology § 170
Replies: 41   Last Post: Dec 8, 2012 5:35 PM

 Messages: [ Previous | Next ]
 mueckenh@rz.fh-augsburg.de Posts: 18,076 Registered: 1/29/05
Re: Matheology § 170
Posted: Dec 6, 2012 4:14 AM

On 5 Dez., 19:54, mstem...@walkabout.empros.com (Michael Stemper)
wrote:
> In article <0e301358-0106-4609-b628-14da5781d...@4g2000yql.googlegroups.com>, WM <mueck...@rz.fh-augsburg.de> writes:

1
11
111
>
> >In mathematics a triangle is defined by one angle and its two sides.
>
> No, in mathematics a triangle is defined by either its three vertices or
> its three sides. Two rays with a common endpoint define an angle, but not
> a triangle.

Two *sides* with an angle defined by these sides define a triangle. It
is just the (wrong) claim of set theory that aleph_0 is a quantity

We have one side of lenght 1*aleph_0 and the other side of length
sqrt(2)* aleph_0. According to Cantor these are quantities, aleph_0 is
even a "whole number", in English commonly called intteger.
>
> If you have two triangles, you can use the lengths of two sides and the
> angle between them to see if they are congruent. But, that only works

That is not of interest here. If you have one angle and the complete
lengths of its sides, then you have constructed a perfect triangle -
in geometry.
>
> If you can't specify real coordinates for the vertices, they don't exist,
> and you do not have a triangle.

What you say sounds, if translated from geometry into algebra (and you
certainly know that both are only different languages for the same
contents): If you can't specify a last number in N, then N has no
cardinality.

But matheologians are not that precise. In case of matheology they
deny the identity of algebra and geometry. And in geometry they accept
completed infinity for the height and the diagonal of my triangle. But
they do not recognize that this would imply completed infinity for the
width of said triangle. It is only a very minor difference. A
mathematician, however, will also be disturbed by very small errors.

Therefore matheology is not a part of mathematics.

Regards, WM