The

**intersection**of $x$ is the D11: Set \begin{equation} \cap x : = \{ z \mid \forall \, y \in x : z \in y \} \end{equation}

▼ | Set of symbols |

▼ | Alphabet |

▼ | Deduction system |

▼ | Theory |

▼ | Zermelo-Fraenkel set theory |

▼ | Set |

▼ | Collection of sets |

Results