Home›Calculus of variations›Hilbert's nineteenth problem🌐EnglishEnglishEspañolItalianoPortuguêsSvenskaРусский中文日本語EntityQ5761157· pop 6· linked from 47 articlesHilbert's nineteenth problemone of the 23 Hilbert problemsAvailable in 6 languagesEspañol中文PortuguêsGreekSvenskavia Wikidata sitelinks · CC0ConnectionsJohn Forbes NashEntityderivativeEntityCategoriesCalculus of variationsHilbert's problemsPartial differential equations