Euclid:Proposition/IX/31

Proposition

In the words of Euclid:

If an odd number be prime to any number, it will also be prime to the double of it.

(The Elements: Book $\text{IX}$: Proposition $31$)

Sources

• 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 2 (2nd ed.) ... (previous) ... (next): Book $\text{IX}$. Propositions