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Verified Analysis of List Update Algorithms

Authors Maximilian P. L. Haslbeck, Tobias Nipkow

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Maximilian P. L. Haslbeck
Tobias Nipkow

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Maximilian P. L. Haslbeck and Tobias Nipkow. Verified Analysis of List Update Algorithms. In 36th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 65, pp. 49:1-49:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2016) https://doi.org/10.4230/LIPIcs.FSTTCS.2016.49

Abstract

This paper presents a machine-verified analysis of a number of classical algorithms for the list update problem: 2-competitiveness of move-to-front, the lower bound of 2 for the competitiveness of deterministic list update algorithms and 1.6-competitiveness of the randomized COMB algorithm, the best randomized list update algorithm known to date. The analysis is verified with help of the theorem prover Isabelle; some low-level proofs could be automated.

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Keywords
  • Program Verification
  • Algorithm Analysis
  • Online Algorithms

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