## EnglishEdit

### NounEdit

**fixed set** (*plural* **fixed sets**)

- (mathematics) A set which is unchanged by a function or other mapping. Formally: a set, S, is a fixed set of a function, f, if and only if for all x in S, f(x)=x.

**fixed set** (*plural* **fixed sets**)

- (mathematics) A set which is unchanged by a function or other mapping. Formally: a set, S, is a fixed set of a function, f, if and only if for all x in S, f(x)=x.