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:
“The best philosophical attitude to adopt towards the world is a union of the sarcasm of gaiety with the indulgence of contempt.”
—Sébastien-Roch Nicolas De Chamfort (1741–1794)
“She had brought love to the union and he had brought a longing after the flesh.”
—Zora Neale Hurston (1891–1960)
“I would save the Union. I would save it the shortest way under the Constitution. The sooner the national authority can be restored; the nearer the Union will be “the Union as it was.””
—Abraham Lincoln (1809–1865)