(i) | \begin{equation} X \neq \emptyset \end{equation} |
(ii) | $a, b \in X$ are each a D2218: Set element in $X$ |
(i) | \begin{equation} X \neq \emptyset \end{equation} |
(ii) | $a, b \in X$ are each a D2218: Set element in $X$ |
(i) | \begin{equation} X \neq \emptyset \end{equation} |
(ii) | $a, b \in X$ are each a D2218: Set element in $X$ |
▶ | Closed real interval |
▶ | Left-closed interval |
▶ | Open interval |
▶ | Right-closed interval |