What is a Real Number? A 5 Minute Introduction

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  • Thread starter Thread starter Greg Bernhardt
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    Introduction
There are two main ways to introduce real numbers. Cauchy sequences are one possibility, Dedekind cuts are another. It is surprising how such a for us common thing like real numbers need some elaborated mathematics in order to properly define them. Even the approach by Cauchy sequences needs the concept of equivalence classes.
 

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