Any subset of a frequent set is a frequent set. This is ___________.
A. Upward closure property.
B. Downward closure property.
C. Maximal frequent set.
D. Border set.
Answer:B
Any subset of a frequent set is a frequent set. This is ___________.
A. Upward closure property. B. Downward closure property. C. Maximal frequent set. D. Border set.