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- closure(itemset, R)
- the epsilon-closure of this item set
- expand_item(item, R)
- expand_itemset(itemset, R)
- expand_itemset2(itemset, R)
- first(itemset, R)
- set of the tokens at the right of each dot in this item set
- follow(itemset, R)
- all transitions from an item set in a dictionary [token]->item set
- itemsetstr(itemset, R, label='')
- itemstr(item, R)
- kernel(itemset)
- the kernel items in this item set
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