TheoremBase

The Modulus Metric on the Complex Numbers

The map sending two complex numbers z and w to the modulus |z - w| is a metric on the complex numbers.

Statement

In the setting of The Complex Numbers, with the Real Numbers Identified with a Subset of the Complex Numbers, let dCd_{\mathbb{C}} be the distance dCd_{\mathbb{C}} on C\mathbb{C}.

dCd_{\mathbb{C}} is a metric on C\mathbb{C}.

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