coset; residue class
Mathematical term used in group theory and modular arithmetic. 剰余類 refers to a set of elements that are equivalent under a given equivalence relation, such as a coset in group theory or a residue class modulo n.
There are three residue classes when integers are divided by 3.
In group theory, we consider cosets with respect to a subgroup.
Compound of 剰余 (remainder, surplus) and 類 (class, category). The term is a direct translation of the mathematical concepts 'coset' and 'residue class'.