the11part\conjgrad.m .........\Crout.m .........\Doolittle.m .........\followup.m .........\GaussJordanXQ.m .........\GaussXQAllMain.m .........\GaussXQByOrder.m .........\GaussXQLineMain.m .........\InvAddSide.m .........\qrxq.m .........\SymPos1.m .........\SymPos2.m .........\SymPos3.m .........\Yesf.m the11part