Home›Browse›Pontryagin class🌐EnglishEnglishDeutschEspañolFrançaisPortuguêsSvenskaРусский한국어中文日本語EntityQ40007· pop 9· linked from 48 articlesPontryagin classSign in to savecharacteristic class defined for real vector bundlesAvailable in 9 languagesFrançaisDeutsch日本語РусскийPortuguêsSvenskaUkrainian한국어via Wikidata sitelinks · CC0