Symbol
The mathematical symbol for logical disjunction varies in the literature. In addition to the word "or", and the formula "Apq", the symbol "", deriving from the Latin word vel for "or", is commonly used for disjunction. For example: "A B " is read as "A or B ". Such a disjunction is false if both A and B are false. In all other cases it is true.
All of the following are disjunctions:
The corresponding operation in set theory is the set-theoretic union.
Read more about this topic: Logical Disjunction
Famous quotes containing the word symbol:
“There is that in me—I do not know what it is—but I know it is in me ...
I do not know it—it is without name—it is a word unsaid,
It is not in any dictionary, utterance, symbol ...
Do you see O my brothers and sisters?
It is not chaos or death—it is form, union, plan—it is eternal life—it is Happiness.”
—Walt Whitman (1819–1892)
“A pool is, for many of us in the West, a symbol not of affluence but of order, of control over the uncontrollable. A pool is water, made available and useful, and is, as such, infinitely soothing to the western eye.”
—Joan Didion (b. 1934)
“Mysticism is the mistake of an accidental and individual symbol for an universal one.”
—Ralph Waldo Emerson (1803–1882)