🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTiếng ViệtTürkçeРусский한국어日本語EntityQ868279· pop 14· linked from 17 articlesHarnack's inequalitytheoremConnectionsdigital object identifierEntityInternational Standard Book NumberEntityCategoriesHarmonic functionsInequalities (mathematics)