Formal Definition
The formal definition is given as follows.
Let be a relation schema and let and (subsets). The multivalued dependency
(which can be read as multidetermines ) holds on if, in any legal relation, for all pairs of tuples and in such that, there exist tuples and in such that
In more simple words the above condition can be expressed as follows: if we denote by the tuple having values for collectively equal to correspondingly, then whenever the tuples and exist in, the tuples and should also exist in .
Read more about this topic: Multivalued Dependency
Famous quotes containing the words formal and/or definition:
“Good gentlemen, look fresh and merrily.
Let not our looks put on our purposes,
But bear it as our Roman actors do,
With untired spirits and formal constancy.”
—William Shakespeare (1564–1616)
“The physicians say, they are not materialists; but they are:MSpirit is matter reduced to an extreme thinness: O so thin!—But the definition of spiritual should be, that which is its own evidence. What notions do they attach to love! what to religion! One would not willingly pronounce these words in their hearing, and give them the occasion to profane them.”
—Ralph Waldo Emerson (1803–1882)