#### Title

Expected Acceptance Counts for Finite Automata with Almost Uniform Input

#### Document Type

Conference Proceeding

#### Department

Mathematics (HMC)

#### Publication Date

11-2002

#### Abstract

If a sequence of independent unbiased random bits is fed into a finite automaton, it is straightforward to calculate the expected number of acceptances among the first *n* prefixes of the sequence. This paper deals with the situation in which the random bits are neither independent nor unbiased, but are nearly so. We show that, under suitable assumptions concerning the automaton, if the the difference between the entropy of the first *n* bits and *n* converges to a constant exponentially fast, then the change in the expected number of acceptances also converges to a constant exponentially fast. We illustrate this result with a variety of examples in which numbers follo wing the reciprocal distribution, which governs the significands of floating-point numbers, are recoded in the execution of various multiplication algorithms.

#### Rights Information

© 2002 Springer

#### DOI

10.1007/3-540-36136-7_56

#### Recommended Citation

Pippenger, Nicholas. "Expected Acceptance Counts for Finite Automata with Almost Uniform Input." Proc. International Symp. on Algorithms and Computation, Springer Lecture Notes in Computer Science, 2518 (2002), 636-646.