An Implementation of the Dual Affine Scaling Algorithm for Minimum-Cost Flow on Bipartite Uncapacitated Networks

Abstract
. We describe an implementation of the dual affine scaling algorithm for linear programmingspecialized to solve minimum cost flow problems on bipartite uncapacitated networks.This implementation uses a preconditioned conjugate gradient algorithm to solve the system of linearequations that determines the search direction at each iteration of the interior point algorithm.Two preconditioners are considered: a diagonal preconditioner and a preconditioner based on theincidence matrix of an...