Direct sum fails for zero error average communication

Gillat Kol, Shay Moran, Amir Shpilka, Amir Yehudayoff

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We show that in the model of zero error communication complexity, direct sum fails for average communication complexity as well as for external information cost. Our example also refutes a version of a conjecture by Braverman et al. that in the zero error case amortized communication complexity equals external information cost. In our examples the underlying distributions do not have full support. One interpretation of a distributions of non full support is as a promise given to the players (the players have a guarantee on their inputs). This brings up the issue of promise versus non-promise problems in this context.

Original languageEnglish
Title of host publicationITCS 2014 - Proceedings of the 2014 Conference on Innovations in Theoretical Computer Science
PublisherAssociation for Computing Machinery
Pages517-522
Number of pages6
ISBN (Print)9781450322430
DOIs
StatePublished - 2014
Externally publishedYes
Event2014 5th Conference on Innovations in Theoretical Computer Science, ITCS 2014 - Princeton, NJ, United States
Duration: 12 Jan 201414 Jan 2014

Publication series

NameITCS 2014 - Proceedings of the 2014 Conference on Innovations in Theoretical Computer Science

Conference

Conference2014 5th Conference on Innovations in Theoretical Computer Science, ITCS 2014
Country/TerritoryUnited States
CityPrinceton, NJ
Period12/01/1414/01/14

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