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Question 7 . Consider the following set of functional dependencies: = { C F A D , C A B , F D D E
Question Consider the following set of functional dependencies:
a Provide a proof of as a numbered sequence of functional
dependencies entailed by terminating in Each step in the
sequence must be explicitly justified by either indicating that the functional
dependency is from or stating which axiom was used to derive it along
with references to the functional dependencies to which the axiom was ap
plied.
Four marks are awarded for a correct proof that may use all essential Arm
strong's axioms reflexivity augmentation, transitivity as well as decom
position and union; two extra marks are awarded if in addition, the proof
does not use decomposition nor union, and its length does not exceed
b Find a minimal cover of Justify your answer by providing details of each
step, including the working of all the entailments one needs to check.
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