level set

Given a function $f \colon X \to K$ where $K$ is a ring or field or abelian group or possibly anything else, and given an element $c \in K$, then the *level set* of $f$ at $c$ in $X$ is the preimage $f^{-1}(c) \in X$.

For $c = 0$ this is the zero locus.

Last revised on January 16, 2019 at 09:27:26. See the history of this page for a list of all contributions to it.