At 31:20does a dfa converted from nfa always contain 2^q states ?I mean , Q' is equal to P(Q)  or Q' is a subset of P(Q) ?####[['dfa', 'Mathematical_Related_Concept', 'NEU'], ['nfa', 'Mathematical_Related_Concept', 'NEU'], ['2^q states', 'Mathematical_Related_Concept', 'NEU'], ['P(Q)', 'Mathematical_Related_Concept', 'NEU'], ["Q'", 'Mathematical_Related_Concept', 'NEU']]