Is there terminology for a function formally defined to depend on several variables whose values only depend on a subset of the variables?
For example, $$f: \mathbb{R}^2 \to \mathbb{R} \,, \quad f: (x,y) \mapsto \sin x \,,$$ $$g: \mathbb{R}^4 \to \mathbb{R} \,, \quad g:(x,y,z,u) \mapsto 4z^2 \,,$$ both functions whose value are only affected by one variable. (E.g. $\frac{\partial f}{\partial y} \equiv 0$, $\frac{\partial g}{\partial u} \equiv 0$.)
Are there any special names for those functions?