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Dictionary

least' up'per bound'

Math.
an upper bound that is less than or equal to all the upper bounds of a particular set. 3 is the least upper bound of the set consisting of 1, 2, 3. Abbr.: lub Also called supremum.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

least squares

leastways

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