# Re: Do Data Models Need to built on a Mathematical Concept?

Date: Mon, 05 May 2003 01:04:53 GMT

Message-ID: <VMita.731148$3D1.404964_at_sccrnsc01>

"Neo" <neo55592_at_hotmail.com> wrote in message news:4b45d3ad.0305041534.3e5fadee_at_posting.google.com...

>

> It is the rdb model which requires each

*> tuple to have the same degree which does not match reality. In*

*> reality, things need not have the same number of attributes.*

Well, I'm not clear on how we decide whether a mathematical model represents reality or not. Looking out my window I see a lovely view, but I don't see any "attributes."

I don't think programming really has anything interesting to say about reality. Programming is about math, and most of what's interesting in math has nothing to do with reality. True, if I have three oranges and you give me four more, I can use math to predict that I will then have seven oranges. Or I can figure out how big a door ought to be with geometry. But if that's our criteria for deciding what should go into math, well, we'd better get rid of negative numbers then. I certainly never had three oranges and had someone take away five of them. I never encountered anything that had an irrational number in it. I don't see the Axiom of Choice having any big impact on my wife's schedule tomorrow.

Marshall Received on Mon May 05 2003 - 03:04:53 CEST