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least upper bound

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noun Mathematics.

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.Abbreviation: lub

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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Also called supremum.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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