The union of two sets and is the set obtained by combining the members of each. This is written , and is pronounced `` union '' or `` cup .'' The union of sets through is written .

Let , , , ... be sets, and let denote the probability of . Then

(1) |

(2) |

(3) |

(4) |

(5) |

(6) |

© 1996-9

1999-05-26