# [FOM] Wildberger on Foundations

joeshipman at aol.com joeshipman at aol.com
Wed Jul 11 12:51:02 EDT 2012

```Professor Norman Wildberger, of the University of New South Wales, has
Foundations of Mathematics are very critical of the way mathematics is
commonly taught (which I agree with, in particular the way High School
and College classes pass the buck to each other and so don't do
Calculus rigorously), and also critical of the cavalier postulation of
infinite sets (which I also agree with, to a point).

However, I think he goes too far in rejecting the standard development
of analysis as, not only nonrigorous, but incapable of being made
rigorous. I had a discussion with him in the comments of this video:

which is entitled "The decline of rigour in modern mathematics".

***
Rigour means logical validity or accuracy. In this lecture we look at
this concept in some detail, describe the important role of Euclid's
Elements, talk about proof, and examine a useful diagram suggesting the
hierarchy of mathematics. We give some explanation for why rigour has
declined during the 20th century (there are other reasons too, that we
will discuss later in this course).

Critical in this picture is the existence of key problematic topics at
the high school / beginning undergrad level, which form a major
obstacle to the logical consistent development of mathematics. We list
some of these topics explicitly, and they will play a major role in
subsequent videos in this series.

This lecture is part of the MathFoundations series, which tries to lay
out proper foundations for mathematics, and will not shy away from
discussing the serious logical difficulties entwined in modern pure
mathematics. The full playlist is at
***

In his discussion with me, he asks for examples of texts where the
modern framework of Analysis is developed completely rigorously from
first principles. I tried to discuss the Robertson-Seymour Graph Minor
Theorem with him in order to pinpoint an example of a theorem which he
would admit as meaningful but would reject all proofs of, but his
unfamiliarity with logical concepts like "Second Order Arithmetic" and
"Primitive Recursive Functions" made this difficult.

Can anyone suggest some source books that might satisfy his request? I
recommend his videos highly, but want to argue that he goes a little
too far (not so much in his criticism of mathematics as taught in High
School and College, but in his criticism of research mathematics as
professionally practiced).

-- JS
```