Robert E. Donovan
INTERSPEECH - Eurospeech 2001
For d and k > 2, d-dimensional k-tape Turing machines cannot simulate d-dimensional Turing machines with k heads on l tape in real time. © 1984.
Robert E. Donovan
INTERSPEECH - Eurospeech 2001
Ziyang Liu, Sivaramakrishnan Natarajan, et al.
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SPIE Optical Engineering + Applications 2009