| 单词 | least upper bound | 
| 释义 | least upper bound [¦lēst ¦ǝp·ǝr `bau̇nd]  MATHEMATICS The least upper bound of a subset A of a set S with ordering is the smallest element of S which is greater than or equal to every element of A. Abbreviated lub. Also known as supremum (sup).  | 
	
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