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Some Decision Problems for Bottom-Up Triangle Acceptors

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1 Author(s)
Akira Nakamura ; Department of Applied Mathematics, Hiroshima University, Hiroshima, Japan; Computer Science Center, University of Maryland, College Park, MD 20742.

It is proved that the emptiness problem for deterministic bottom-up triangle acceptors (BTA's) over a single input symbol is recursively unsolvable. From this result, it is also shown that certain decision problems involving BTA's and BPA's (deterministic bottom-up pyramid acceptors) are unsolvable.

Published in:

IEEE Transactions on Pattern Analysis and Machine Intelligence  (Volume:PAMI-1 ,  Issue: 4 )