🌐EnglishEnglishDeutschEspañolItalianoPortuguêsРусский한국어日本語EntityQ7795912· pop 10· linked from 25 articlesThomson problemmathematical problemAvailable in 10 languagesEspañolDeutsch日本語РусскийPortuguêsItalianoRomanianSlovenian한국어via Wikidata sitelinks · CC0ConnectionsJ. J. ThomsonEntitytriangular bipyramidEntityCategoriesCircle packingElectronElectrostaticsUnsolved problems in mathematics