Let $f: X \rightarrow \mathbb{R}$ be a real valued function whose domain is an arbitrary set $X$. The **set-theoretic support** of $f$ is the set of points in $X$ where $f$ is non-zero: $supp(f) = \{ x \in X : f(x) \neq 0\}$ --- Date: 20221117 Links to: Tags: #review References: *