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Is first order contained in an initial segment of PTIME?

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Computer Science Logic (CSL 1994)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 933))

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Abstract

By “initial segments of P” we mean classes DTime(n k). The question of whether for any fixed signature the first-order definable predicates in finite models of this signature are all in an initial segment of P is shown to be related to other intriguing open problems in complexity theory and logic, like P=PSpace.

The second part of the paper strengthens the result of Ph. Kolaitis of logical definability of unambiguous computations.

This work has been partially supported by NSF Grant CCR 9403809.

A part of this research was carried out while the author was visiting UCLA and supported in part by NSF Grant CCR 9403809.

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Leszek Pacholski Jerzy Tiuryn

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© 1995 Springer-Verlag Berlin Heidelberg

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Stolboushkin, A.P., Taitslin, M.A. (1995). Is first order contained in an initial segment of PTIME?. In: Pacholski, L., Tiuryn, J. (eds) Computer Science Logic. CSL 1994. Lecture Notes in Computer Science, vol 933. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0022260

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  • DOI: https://doi.org/10.1007/BFb0022260

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  • Online ISBN: 978-3-540-49404-1

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