A Unified Approach to Interior Point Algorithms for Linear Complementarity Problems

A Unified Approach to Interior Point Algorithms for Linear Complementarity Problems

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Following Karmarkar's 1984 linear programming algorithm,

numerous interior-point algorithms have been proposed for

various mathematical programming problems such as linear

programming, convex quadratic programming and convex

programming in general. This monograph presents a study of

interior-point algorithms for the linear complementarity

problem (LCP) which is known as a mathematical model for

primal-dual pairs of linear programs and convex quadratic

programs. A large family of potential reduction algorithms

is presented in a unified way for the class of LCPs where

the underlying matrix has nonnegative principal minors

(P0-matrix). This class includes various important

subclasses such as positive semi-definite matrices,

P-matrices, P*-matrices introduced in this monograph, and

column sufficient matrices. The family contains not only the

usual potential reduction algorithms but also path following

algorithms and a damped Newton method for the LCP. The main

topics are global convergence, global linear convergence,

and the polynomial-time convergence of potential reduction

algorithms included in the family.