Functional dependencies , minimizing SUU->V

Question

Can SUU->V or any functional dependency that contains two or more times each attribute be simplified to the same dependency with one attribute? So SUU->V becomes SU->V or STTT->Q becomes ST->Q ?

Answer 1

Yes, each side of a Functional Dependency is a set of attributes, not a multiset, so SUU -> V can be simplified to SU -> V.

If you think about the definition of Functional Dependency you will understand why this is true.