The statement “if an itemset is infrequent then it’s superset must also be an infrequent set” denotes _______.
A. Maximal frequent set.
B. Border set.
C. Upward closure property.
D. Downward closure property.
Answer:C
The statement “if an itemset is infrequent then it’s superset must also be an infrequent set” denotes _______.
A. Maximal frequent set. B. Border set. C. Upward closure property. D. Downward closure property.