Multiparty Karchmer - Wigderson Games and Threshold Circuits

Authors Alexander Kozachinskiy , Vladimir Podolskii

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Author Details

Alexander Kozachinskiy
  • Department of Computer Science, University of Warwick, Coventry, UK
Vladimir Podolskii
  • Steklov Mathematical Institute, Russian Academy of Sciences, Moscow, Russia


The authors are grateful to Alexander Shen for suggesting to generalize our initial results.

Cite AsGet BibTex

Alexander Kozachinskiy and Vladimir Podolskii. Multiparty Karchmer - Wigderson Games and Threshold Circuits. In 35th Computational Complexity Conference (CCC 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 169, pp. 24:1-24:23, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)


We suggest a generalization of Karchmer - Wigderson communication games to the multiparty setting. Our generalization turns out to be tightly connected to circuits consisting of threshold gates. This allows us to obtain new explicit constructions of such circuits for several functions. In particular, we provide an explicit (polynomial-time computable) log-depth monotone formula for Majority function, consisting only of 3-bit majority gates and variables. This resolves a conjecture of Cohen et al. (CRYPTO 2013).

Subject Classification

ACM Subject Classification
  • Theory of computation → Circuit complexity
  • Karchmer-Wigderson Games
  • Threshold Circuits
  • threshold gates
  • majority function


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