Euclidean metrization was a mathematical concept based on the system of geometry attributed to the ancient Greek mathematician Euclid.
In 2366, as part of his math homework, Wesley Crusher studied a locally Euclidean metrization of a k-fold contravariant Riemannian tensor field in Ten Forward. He explained the matter of the assignment to the Gatherer Brull, who, after Wesley's explanation, asked him is he was any good at the subject matter. (TNG: "The Vengeance Factor")