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Relations Between Communication Complexity, Linear Arrangements, and Computational Complexity

Identifieur interne : 001868 ( Istex/Corpus ); précédent : 001867; suivant : 001869

Relations Between Communication Complexity, Linear Arrangements, and Computational Complexity

Auteurs : Jürgen Forster ; Matthias Krause ; Satyanarayana V. Lokam ; Rustam Mubarakzjanov ; Niels Schmitt ; Hans Ulrich Simon

Source :

RBID : ISTEX:7B379D46B45F5700F6B0662AC093E27351FDE0DD

Abstract

Abstract: Recently, Forster [7] proved a new lower bound on probabilistic communication complexity in terms of the operator norm of the communication matrix. In this paper, we want to exploit the various relations between communication complexity of distributed Boolean functions, geometric questions related to half space representations of these functions, and the computational complexity of these functions in various restricted models of computation. In order to widen the range of applicability of Forster’s bound, we start with the derivation of a generalized lower bound. We present a concrete family of distributed Boolean functions where the generalized bound leads to a linear lower bound on the probabilistic communication complexity (and thus to an exponential lower bound on the number of Euclidean dimensions needed for a successful half space representation), whereas the old bound fails. We move on to a geometric characterization of the well known communication complexity class C-PP in terms of half space representations achieving a large margin. Our characterization hints to a close connection between the bounded error model of probabilistic communication complexity and the area of large margin classification. In the final section of the paper, we describe how our techniques can be used to prove exponential lower bounds on the size of depth-2 threshold circuits (with still some technical restrictions). Similar results can be obtained for read-k-times randomized ordered binary decision diagram and related models.

Url:
DOI: 10.1007/3-540-45294-X_15

Links to Exploration step

ISTEX:7B379D46B45F5700F6B0662AC093E27351FDE0DD

Le document en format XML

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<affiliation>E-mail: krause@th.informatik.uni-mannheim.de</affiliation>
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<namePart type="given">Satyanarayana</namePart>
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<affiliation>School of Mathematics, Institute for Advanced Study, 08540, Princeton, NJ, USA</affiliation>
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<affiliation>Fakultät für Informatik, Universität Trier, D-54286, Trier, Germany</affiliation>
<affiliation>E-mail: rustam@TI.uni-trier.de</affiliation>
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<namePart type="given">Niels</namePart>
<namePart type="family">Schmitt</namePart>
<affiliation>Fakultät für Mathematik, Ruhr-Universität Bochum, D-44780, Bochum, Germany</affiliation>
<affiliation>E-mail: nschmitt@lmi.ruhr-uni-bochum.de</affiliation>
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<namePart type="given">Hans</namePart>
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<namePart type="family">Simon</namePart>
<affiliation>Fakultät für Mathematik, Ruhr-Universität Bochum, D-44780, Bochum, Germany</affiliation>
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<abstract lang="en">Abstract: Recently, Forster [7] proved a new lower bound on probabilistic communication complexity in terms of the operator norm of the communication matrix. In this paper, we want to exploit the various relations between communication complexity of distributed Boolean functions, geometric questions related to half space representations of these functions, and the computational complexity of these functions in various restricted models of computation. In order to widen the range of applicability of Forster’s bound, we start with the derivation of a generalized lower bound. We present a concrete family of distributed Boolean functions where the generalized bound leads to a linear lower bound on the probabilistic communication complexity (and thus to an exponential lower bound on the number of Euclidean dimensions needed for a successful half space representation), whereas the old bound fails. We move on to a geometric characterization of the well known communication complexity class C-PP in terms of half space representations achieving a large margin. Our characterization hints to a close connection between the bounded error model of probabilistic communication complexity and the area of large margin classification. In the final section of the paper, we describe how our techniques can be used to prove exponential lower bounds on the size of depth-2 threshold circuits (with still some technical restrictions). Similar results can be obtained for read-k-times randomized ordered binary decision diagram and related models.</abstract>
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<title>FST TCS 2001: Foundations of Software Technology and Theoretical Computer Science</title>
<subTitle>21st Conference Bangalore, India, December 13–15, 2001 Proceedings</subTitle>
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<name type="personal">
<namePart type="given">Ramesh</namePart>
<namePart type="family">Hariharan</namePart>
<affiliation>Department of Computer Science and Automation, Indian Institute of Science, 560012, Bangalore, India</affiliation>
<affiliation>E-mail: ramesh@csa.iisc.ernet.in</affiliation>
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<affiliation>Department of Computer Science and Automation, Indian Institute of Science, 560012, Bangalore, India</affiliation>
<affiliation>E-mail: vinay@csa.iisc.ernet.in</affiliation>
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<affiliation>Chennai Mathematical Institute, 92 G.N. Chetty Road, 600 017, Chennai, India</affiliation>
<affiliation>E-mail: madhavan@cmi.ac.in</affiliation>
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<topic authority="SpringerSubjectCodes" authorityURI="SUCO11645">Computer Science</topic>
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<topic authority="SpringerSubjectCodes" authorityURI="I16013">Computation by Abstract Devices</topic>
<topic authority="SpringerSubjectCodes" authorityURI="I17028">Discrete Mathematics in Computer Science</topic>
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<identifier type="DOI">10.1007/3-540-45294-X</identifier>
<identifier type="ISBN">978-3-540-43002-5</identifier>
<identifier type="eISBN">978-3-540-45294-2</identifier>
<identifier type="ISSN">0302-9743</identifier>
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<title>Contributed Papers</title>
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<start>171</start>
<end>182</end>
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<title>Lecture Notes in Computer Science</title>
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<name type="personal">
<namePart type="given">Gerhard</namePart>
<namePart type="family">Goos</namePart>
<affiliation>Karlsruhe University, Germany</affiliation>
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<name type="personal">
<namePart type="given">Juris</namePart>
<namePart type="family">Hartmanis</namePart>
<affiliation>Cornell University, NY, USA</affiliation>
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<name type="personal">
<namePart type="given">Jan</namePart>
<namePart type="family">van Leeuwen</namePart>
<affiliation>Utrecht University, The Netherlands</affiliation>
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