Home›1885 introductions›stelling van de harige bal🌐NederlandsEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусскийفارسی中文日本語EntityQ1077741· pop 22· linked from 39 articlesstelling van de harige balAlso known as hedgehog theoremwiskundige stellingWikidata factsImageHairy ball.pngShow 1 more factCommons categoryHairy ball theoremSources (1)wikidata.orgvia Wikidata · CC0Available in 21 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoAsturianCatalanConnectionsn-sphereEntityPoincaré–Hopf theoremEntityCategories1885 introductionsFixed points (mathematics)HairMetaphors referring to body partsSpheresTheorems in algebraic topologyTheorems in differential topology