. "a set that is closed, associative, has an identity element and every element has an inverse"@en-us . "105661393"@en-us . "06016853-n"^^ . . "a set that is closed, associative, has an identity element and every element has an inverse"@en-us . . "mathematical group"@en-us . . "group"^^ . . "106016853"^^ . "0"^^ . "104606861"@en-us . . . . . . . . . "0"^^ . . . . . . . "group"@en-us . .