Let $X$ be a D11: Set.
A D11: Set $E$ is a subset of $X$ if and only if
\begin{equation}
\forall \, x \in E : x \in X
\end{equation}
| ▼ | Set of symbols |
| ▼ | Alphabet |
| ▼ | Deduction system |
| ▼ | Theory |
| ▼ | Zermelo-Fraenkel set theory |
| ▼ | Set |
| ▶ | Power set |
| ▶ | Proper subset |
| ▶ | Superset |
| ▶ |
Convention 0
(Notation for subset relation)
If $X$ is a D11: Set and $E$ is a D78: Subset of $X$, we denote this by $E \subseteq X$.
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