Alternating, private alternating, and quantum alternating realtime automata
Gökalp Demirci,
Mika Hirvensalo,
Klaus Reinhardt
et al.
Abstract:We present new results on realtime alternating, private alternating, and quantum alternating automaton models. Firstly, we show that the emptiness problem for alternating one-counter automata on unary alphabets is undecidable. Then, we present two equivalent definitions of realtime private alternating finite automata (PAFAs). We show that the emptiness problem is undecidable for PAFAs. Furthermore, PAFAs can recognize some nonregular unary languages, including the unary squares language, which seems to be diff… Show more
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