An EP theorem for DLCP and interior point methods

Tibor Illés, Marianna Nagy, Tamás Terlaky

Research output: Chapter in Book/Report/Conference proceedingConference contribution book


The linear complementarity problem (LCP) belongs to the class of NP-complete problems. Therefore we can not expect a polynomial time solution method for LCPs without requiring some special property of the matrix of the problem. We show that the dual LCP can be solved in polynomial time if the matrix is row sufficient, moreover in this case all feasible solutions are complementary. Furthermore we present an existentially polytime (EP) theorem for the dual LCP with arbitrary matrix.
Original languageEnglish
Title of host publicationSOR'07
Subtitle of host publicationThe 9th International Symposium on Operational Research in Slovenia Nova Gorica, SLOVENIA, September 26 - 28, 2007
EditorsZadnikStirn L, Drobne S
Place of PublicationLjubljana
Number of pages5
Publication statusPublished - 28 Sep 2007


  • linear complementarity problem
  • row sufficient matrix
  • EP theorem


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