Home›Browse›flat manifold🌐EnglishEnglishDeutschEspañolFrançaisItaliano한국어日本語EntityQ601110· pop 6· linked from 199 articlesflat manifoldSign in to saveRiemannian manifold with vanishing Riemann curvatureAvailable in 6 languagesEspañolFrançaisDeutschItalianoCatalanvia Wikidata sitelinks · CC0