Given a Boolean propositional formula, phi(X-n) over the basis Omega = {boolean AND, boolean OR, ->}, we consider the following decision problem: is there a subset of literals, S, for which phi(X-n) equivalent to b...
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Given a Boolean propositional formula, phi(X-n) over the basis Omega = {boolean AND, boolean OR, ->}, we consider the following decision problem: is there a subset of literals, S, for which phi(X-n) equivalent to boolean AND(gamma is an element of S) y or phi(X-n) equivalent to boolean OR(gamma is an element of S) y? We prove that the 'obvious' Sigma(p)(2) upper bound is suboptimal and that the problem is decidable in P-parallel to(np) the class of languages decidable by polynomial time methods allowed to make non-adaptive quer| i| es to an nporacle. We further show that the associated function problem of computing a witnessing such subset when one exists can be solved in FP parallel to np.
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