The resolution complexity of the perfect matching principle was studied by Razborov [Raz04], who developed a technique for proving its lower bounds for dense graphs. We construct a constant degree bipartite graph Gn such that the resolution complexity of the perfect matching principle for Gn is 2Ω(n), where n is the number of vertices in Gn. This lower bound is tight up to some polynomial. Our result implies the 2Ω(n) lower bounds for the complete graph K2n+1 and the complete bipartite graph Kn,O(n) that improves the lower bounds following from [Raz04]. Our results also imply the well-known exponential lower bounds on the resolution complexity of the pigeonhole principle, the functional pigeonhole principle and the pigeonhole principle over a graph. We also prove the following corollary. For every natural number d, for every n large enough, for every function h : {1, 2, ..., n} → {1, 2, ..., d}, we construct a graph with n vertices that has the following properties. There exists a constant D such that the degree of the i-th vertex is at least h(i) and at most D, and it is impossible to make all degrees equal to h(i) by removing the graph’s edges. Moreover, any proof of this statement in the resolution proof system has size 2Ω(n). This result implies well-known exponential lower bounds on the Tseitin formulas as well as new results: for example, the same property of a complete graph.

Original languageEnglish
Title of host publicationComputer Science - Theory and Applications - 10th International Computer Science Symposium in Russia, CSR 2015, Proceedings
EditorsLev D. Beklemishev, Daniil V. Musatov, Daniil V. Musatov
PublisherSpringer Nature
Pages219-230
Number of pages12
ISBN (Print)9783319202969
DOIs
StatePublished - 1 Jan 2015
Event10th International Computer Science Symposium in Russia, CSR 2015 - Listvyanka, Russian Federation
Duration: 13 Jul 201517 Jul 2015

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume9139
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference10th International Computer Science Symposium in Russia, CSR 2015
Country/TerritoryRussian Federation
CityListvyanka
Period13/07/1517/07/15

    Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

ID: 49785764