🌐EnglishEnglishEspañolFrançaisItalianoNederlandsPolskiTiếng ViệtРусский한국어中文日本語EntityQ2520842· pop 12· linked from 60 articlesgermequivalence class of objects sharing local properties at a point in a topological spaceAvailable in 12 languagesFrançais中文日本語РусскийItalianoFinnishNederlandsPolskiTiếng ViệtUkrainianConnectionssubsetEntitytopological spaceEntityCategoriesSheaf theoryTopology