🌐EnglishEnglishDeutschРусский日本語EntityQ5637590· pop 5· linked from 16 articlesHadamard spacegeodesically complete metric space of non-positive curvatureAvailable in 5 languagesDeutschРусскийHebrewUkrainianvia Wikidata sitelinks · CC0ConnectionsmanifoldEntityinner product spaceEntityCategoriesFunctional analysisGeometric topologyHilbert spacesMetric spaces