Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X 38 3 2012 09 15 Improved infeasible-interior-point algorithm for linear complementarity problems787 803 en Maryam Zangiabadi Dept. Appied Mathematics, Shahrekord University Hossein Mansouri Dept. Applied Mathematics, Shahrekord University 2010 06 29 linear complementarity problems interior-point methods polynomial complexity full-Newton steps search directions