chap5\chap5_01_PPC.m .....\chap5_02_PP_STC.m .....\chap5_03_PP_STC_Direct.m .....\chap5_04_PID.m .....\chap5_05_PID_PPC.m .....\chap5_06_STC_PID.m .....\diophantine.m chap5