SIGACT news complexity theory column 34

  • Authors:
  • Lane A. Hemaspaandra

  • Affiliations:
  • University of Rochester, Rochester, NY

  • Venue:
  • ACM SIGACT News
  • Year:
  • 2001

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Abstract

This issue's guest columnists are angels. The column was faced with a last-minute cancellation, and they prepared on very short notice a wonderful column. And I'm sure that many readers of the column will want to learn even more by, for example, reading their monograph Complexity Classifications of Boolean Constraint Satisfaction Problems [7].Future complexity columns include Holzer/McKenzie on a familiar complexity class turning up in a surprising context, Gasarch (and a host of contributors) on the future of NP, Schaeffer/Umans on completeness for higher levels of the polynomial hierarchy, Nickelsen/Tantau on partial information classes, and Paturi on the complexity of k-SAT,Regarding the Schaeffer/Umans column, their 2-part column will be in part a kind of Garey and Johnson for completeness results for ∑ip and πip, i ≥ 2. You can help their project by, if you have proven natural sets complete for NPNP, coNPNP, NPNPNP, coNPNPNP, etc., letting them (MSchaefer@cti.depaul.edu and umans@microsoft.com) know of your result and its best citation location. Thanks!