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Guest Column: Structure in Communication Complexity and Constant-Cost Complexity Classes

Published:26 March 2024Publication History
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Abstract

Several theorems and conjectures in communication complexity state or speculate that the complexity of a matrix in a given communication model is controlled by a related analytic or algebraic matrix parameter, e.g., rank, sign-rank, discrepancy, etc. The forward direction is typically easy as the structural implications of small complexity often imply a bound on some matrix parameter. The challenge lies in establishing the reverse direction, which requires understanding the structure of Boolean matrices for which a given matrix parameter is small or large. We will discuss several research directions that align with this overarching theme.

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          cover image ACM SIGACT News
          ACM SIGACT News  Volume 55, Issue 1
          March 2024
          88 pages
          ISSN:0163-5700
          DOI:10.1145/3654780
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