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On resource-bounded measure and pseudorandomness

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Foundations of Software Technology and Theoretical Computer Science (FSTTCS 1997)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 1346))

Abstract

In this paper we extend a key result of Nisan and Wigderson [17] to the nondeterministic setting: for all α > 0 we show that if there is a language in E = DTIME(2O(n)) that is hard to approximate by nondeterministic circuits of size 2αn, then there is a pseudorandom generator that can be used to derandomize BP·NP (in symbols, BP·NP = NP). By applying this extension we are able to answer some open questions in [14] regarding the derandomization of the classes BP·σ Pk and BP·θ P k under plausible measure theoretic assumptions. As a consequence, if θ P2 does not have p-measure 0, then AM ∩ coAM is low for θ P2 . Thus, in this case, the graph isomorphism problem is low for θ P2 . By using the Nisan-Wigderson design of a pseudorandom generator we unconditionally show the inclusion MA ⊑ ZPPNPNP and that MA∩ coMA is low for ZPPNP.

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S. Ramesh G Sivakumar

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© 1997 Springer-Verlag Berlin Heidelberg

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Arvind, V., Köbler, J. (1997). On resource-bounded measure and pseudorandomness. In: Ramesh, S., Sivakumar, G. (eds) Foundations of Software Technology and Theoretical Computer Science. FSTTCS 1997. Lecture Notes in Computer Science, vol 1346. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0058034

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  • DOI: https://doi.org/10.1007/BFb0058034

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  • Print ISBN: 978-3-540-63876-6

  • Online ISBN: 978-3-540-69659-9

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