Unique negative dimension (UND) is a complexity measure for the model of learning from positive examples. The unique negative dimension of a class of concepts is the size of the maximum subclass such that for every concept, we have is nonempty.
This concept was originally proposed by M. Gereb-Graus in "Complexity of learning from one-side examples", Technical Report TR-20-89, Harvard University Division of Engineering and Applied Science, 1989.
Famous quotes containing the words unique, negative and/or dimension:
“I feel free as a bird. I’m in a unique position because I’m the boss. I buy what I like. I initiate things. I can experiment with all kinds of things I think the kids might be interested in. Nobody interferes. For me, it’s no chore to go to work. Most people never get to do this at any time in their lives.”
—Sarah Houghton, U.S. librarian. As quoted in Working, book 9, by Studs Terkel (1973)
“Isolation in creative work is an onerous thing. Better to have negative criticism than nothing at all.”
—Anton Pavlovich Chekhov (1860–1904)
“God cannot be seen: he is too bright for sight; nor grasped: he is too pure for touch; nor measured: for he is beyond all sense, infinite, measureless, his dimension known to himself alone.”
—Marcus Minucius Felix (2nd or 3rd cen. A.D.)