Euclidean field

Euclidean field

In mathematics, a Euclidean field is an ordered field "K" for which every non-negative element is a square: that is, "x" ≥ 0 in "K" implies that "x" = "y"2 for some "y" in "K".

Properties

* Every Euclidean field is an ordered Pythagorean field, but the converse is not true.

Examples

* The rational numbers Q with the usual operations and ordering do not form a Euclidean field. For example, 2 is not a square in Q since the square root of 2 is irrational.
* The real numbers R with the usual operations and ordering form a Euclidean field.
* The complex numbers C do not form a Euclidean field since they cannot be given the structure of an ordered field.

External links

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References


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