Cantor-Dedekind axiom

Cantor-Dedekind axiom

The phrase Cantor-Dedekind axiom has been used to describe the thesis that the real numbers are order-isomorphic to the linear continuum of geometry. In other words the axiom states that there is a one to one correspondence between real numbers and points on a line. It is not an axiom in the ordinary mathematical sense.

This axiom is the cornerstone of analytic geometry. The Cartesian coordinate system developed by Rene Descartes explicity assumes this axiom by blending the distinct concepts of real number system with the geometric line or plane into a conceptual metaphor. This is sometimes known as the "real number line" blend [cite book | author = George Lakoff and Rafael E. Núñex | title = Where Mathematics Comes From: How the embodied mind brings mathematics into being | publisher=Basic Books|year=2000|id= ISBN 0-465-03770-4] :

A consequence of this axiom is that Alfred Tarski's proof of the decidability of the ordered real field could be seen as an algorithm to solve any problem in Euclidean geometry.

Notes

References

* Erlich, P.. (1994). "General introduction". "Real Numbers, Generalizations of the Reals, and Theories of Continua", vi-xxxii. Edited by P. Erlich, Kluwer Academic Publishers, Dordrecht


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