The tuples -LRB- a , a -RRB- and -LRB- a -RRB- are not equal either because in tuples and multisets multiplicity is considered , affecting cardinality .

A multiset can also be considered an unordered tuple : The tuples -LRB- a , b -RRB- and -LRB- b , a -RRB- are not equal , and the tuples -LRB- a , a -RRB- and -LRB- a -RRB- are not equal either .
