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The polynomial and linear hierarchies in models where the weak pigeonhole principle fails

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F08%3A00319585" target="_blank" >RIV/67985840:_____/08:00319585 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The polynomial and linear hierarchies in models where the weak pigeonhole principle fails

  • Original language description

    We give some conditional unprovability results about statements from structural complexity theory in weak arithmetic. In particular we show, under the assumption that factoring is hard, that a model of PV exists in which the polynomial hierarchy does notcollapse to the linear hierarchy; that a model of S^1_2 exists in which NP is not in the second level of the linear hierarchy; and that a model of S^1_2 exists in which the polynomial hierarchy collapses to the linear hierarchy and in which the strict version of PH does not collapse to a finite level.

  • Czech name

    Polynomiální a lineární hierarchie v modelech, kde neplatí slabý princip PHP

  • Czech description

    Dokázali jsme několik podmíněných výsledků o nedokazatelnosti vět ze strukturální teorie složitosti a slabé aritmetiky. Konkrétně jsme ukázali za předpokladu, že rozklad čísel je těžká operace, že existuje model PV, ve kterém polynomiální hierarchie nekolapsuje na lineární hierarchii, že existuje model S^1_2, ve kterém NP není druhá hladina lineární hierarchie a že existuje model S^1_2, ve kterém polynomiální hierarchie kolapsuje na lineární hierarchii.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BA - General mathematics

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/LC505" target="_blank" >LC505: Eduard Čech Center for Algebra and Geometry</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Symbolic Logic

  • ISSN

    0022-4812

  • e-ISSN

  • Volume of the periodical

    73

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    15

  • Pages from-to

  • UT code for WoS article

    000256103700013

  • EID of the result in the Scopus database