...east upper bound)，记为sup B；若x是B的下界，且若x′是B的任意一个下界，必有x′≤x, 则称x是B的下确界(greatest lower bound)，记为inf B. 易见，最大、最小元及上、下确界若存在是唯一的.
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The greatest lower bound of constraint was the bound of tasks for satisfying the constraint and can be used to guarantee the "meet row" weakly hard real-time constraint.
下确界限制用于保证任务满足“至少满足”弱硬实时限制，是任务满足限制的下确界。
In this paper, some important properties of cone lower bound and the greatest cone lower bound are introduced, the corresponding proofs are presented.
讨论了锥下界和锥最大下界的若干重要性质，并给出了相应的证明。
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