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This paper describes a new search procedure and its application to the problem of obtaining telephone directory information from spoken spelled input. The method obtains its speed from using the concept of equivalence classes, with names classified according to their letter-by-letter acoustic similarity. It derives its accuracy from the use of a minimum-distance criterion for selecting answers. The...
We consider expressions whose arguments are relations and whose operators are chosen from among ∪, ο, *, and -1. We further assume that operands may be designated "sparse" or "dense", in a manner to be made formal subsequently. Our aim is to determine whether the evaluation of such an expression is (a) as hard as general transitive closure (b) as hard as transitive closure for...
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