Technical term in abstract algebra; a set formed by adding a fixed element to all elements of a subgroup. See also 剰余類.
See also: 剰余類
In group theory, we often consider cosets of a subgroup.
左コセットと右コセットが一致するとき、その部分群は正規部分群である。
When the left coset and right coset coincide, the subgroup is a normal subgroup.