TR95-036 Authors: Richard Beigel, William Gasarch, Efim Kinber

Publication: 6th July 1995 16:29

Downloads: 1218

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For a set A and a number n let F_n^A(x_1,...,x_n) =

A(x_1)\cdots A(x_n). We study how hard it is to approximate this

function in terms of the number of queries required. For a general

set A we have exact bounds that depend on functions from coding

theory. These are applied to get exact bounds for the case where A is

semirecursive, A is superterse, and (assuming P<>NP) A=SAT. We obtain

exact bounds for A=K using other methods.