🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisNederlandsPolskiPortuguêsTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ902019· pop 28· linked from 448 articlessymmetry groupgroup of transformations under which the object is invariantConnectionsgroupEntitygroup actionEntityCategoriesGeometryGroup theorySymmetry