Chap_4 ......\batch.m ......\make_plot.m ......\make_rp.m ......\plot_4_10.m ......\plot_4_11a_and_4_12a.m ......\plot_4_11b_and_4_12b.m ......\plot_4_8a_and_4_9a.m ......\plot_4_8b_and_4_9b.m ......\plot_4_8c_and_4_9c.m ......\plot_4_8d_and_4_9d.m ......\steepest_descent.m