- ITEMSET is a vector of item numbers; NITEMSET is its size
- 9actually, points to just beyond the end of the part of it that is
- significant). closure places there the indices of all items which
+ ITEMSET is a sorted vector of item numbers; NITEMSET is its size
+ (actually, points to just beyond the end of the part of it that is
+ significant). CLOSURE places there the indices of all items which