Superset

• Definition: A set $A$ is a superset of another set $B$ if every element of $B$ is also an element of $A$.
• Notation:

$$A\supseteq B$$

• Example:
  • $\{1,2,3\}\supseteq 1,2$
  • $\mathbb{R}\supseteq \mathbb{N}$
• Related: Strict Superset