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 union of hands and hearts.”
—Jeremy Taylor (1613–1667)
“One thing that makes art different from life is that in art things have a shape ... it allows us to fix our emotions on events at the moment they occur, it permits a union of heart and mind and tongue and tear.”
—Marilyn French (b. 1929)
“[With the Union saved] its form of government is saved to the world; its beloved history, and cherished memories, are vindicated; and its happy future fully assured, and rendered inconceivably grand.”
—Abraham Lincoln (1809–1865)