The

**symmetric difference**of $X$ and $Y$ is the D11: Set \begin{equation} X \triangle Y : = (X \setminus Y) \cup (Y \setminus X) \end{equation}

▾ Set of symbols

▾ Alphabet

▾ Deduction system

▾ Theory

▾ Zermelo-Fraenkel set theory

▾ Set

▾ Set difference

▾ Alphabet

▾ Deduction system

▾ Theory

▾ Zermelo-Fraenkel set theory

▾ Set

▾ Set difference