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An Example of a Theorem that has Contradictory Relativizations and a Diagonalization Proof

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Abstract

We construct a computable space bound S(n), with n2lessthanS(n)lessthann3 and show by diagonalization that DSPACE [S(n)] = DSPACE [S(n) log n]. Moreover, we can show that there exists an oracle A such that DSPACE [S(n)] DSPACEA[S(n) log n]. This is a counterexample to the belief that is a theorem has contradictory relativizations, then is cannot be proved using standard techniques like diagonalization [7].

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1989-11

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Cornell University

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computer science; technical report

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http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.cs/TR89-1059

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technical report

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