Conference paper
Alternation
Ashok K. Chandra, Larry J. Stockmeyer
FOCS 1976
It is shown that for every finite-state automaton there exists an equivalent nondeterministic automaton with a planar state graph. However there exist finite-state automata with no equivalent deterministic automaton with a planar state graph. © 1976 Springer-Verlag.
Ashok K. Chandra, Larry J. Stockmeyer
FOCS 1976
Ashok K. Chandra, Philip M. Merlin
STOC 1977
Ashok K. Chandra
FOCS 1978
Ashok K. Chandra, Harry R. Lewis, et al.
STOC 1981