[1] : WordNet (r) 2.0

upper bound
     n : mathematics a number equal to or greater than any other
         number in a given set

[2] : The Free On-line Dictionary of Computing (27 SEP 03)

upper bound
     
        an upper bound of two elements x and y under some relation
        <= is an element z such that x <= z and y <= z.
     
        "<=" is written in latex as \sqsubseteq.
     
        see also least upper bound.
     
        1995-02-15
     
     
see also:
relation latex \sqsubseteq least upper bound 

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