Show the following rule for MVDs The attributes are arbitrar

Show the following rule for MVD\'s. The attributes are arbitrary sets X, Y, Z and the other unnamed attributes of the relation in which these dependencies hold. The Difference Rule. If X, Y, and Z are sets of attributes, X rightarrow rightarrow Y, and X rightarrow rightarrow Z, then X rightarrow rightarrow (Y-Z).

Solution

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