ThmDex – An index of mathematical definitions, results, and conjectures.

Result R4444 on D70: Set difference

Superset differenced from set equals empty set

Formulation 0

Let $X$ be a D11: Set such that

(i)	$E \subseteq X$ is a D78: Subset of $X$

Then \begin{equation} E \setminus X = \emptyset \end{equation}