🌐EnglishEnglishDeutschFrançaisРусский中文日本語EntityQ2152232· pop 7· linked from 21 articlesnormal coordinatesspecial coordinate system in differential geometryAvailable in 6 languagesFrançaisDeutsch中文РусскийUkrainianvia Wikidata sitelinks · CC0ConnectionsAlbert EinsteinPersonInternational Standard Book NumberEntityCategoriesCoordinate systems in differential geometryRiemannian geometry