Union
The union used in set theory is defined in terms of a logical disjunction: x ∈ A ∪ B if and only if (x ∈ A) ∨ (x ∈ B). Because of this, logical disjunction satisfies many of the same identities as set-theoretic union, such as associativity, commutativity, distributivity, and de Morgan's laws.
Read more about this topic: Logical Disjunction
Famous quotes containing the word union:
“You can no more keep a martini in the refrigerator than you can keep a kiss there. The proper union of gin and vermouth is a great and sudden glory; it is one of the happiest marriages on earth, and one of the shortest-lived.”
—Bernard Devoto (1897–1955)
“I not only rejoice, but congratulate my beloved country Texas is reannexed, and the safety, prosperity, and the greatest interest of the whole Union is secured by this ... great and important national act.”
—Andrew Jackson (1767–1845)
“She had brought love to the union and he had brought a longing after the flesh.”
—Zora Neale Hurston (1891–1960)