{VERSION 4 0 "IBM INTEL NT" "4.0" } {USTYLETAB {CSTYLE "Maple Input" -1 0 "Courier" 0 1 255 0 0 1 0 1 0 0 1 0 0 0 0 1 }{PSTYLE "Normal" -1 0 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 1 1 1 1 }1 1 0 0 0 0 1 0 1 0 2 2 0 1 }} {SECT 0 {EXCHG {PARA 0 "" 0 "" {TEXT -1 19 "Figure2.2.4; page26" }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 14 "with(DEtools):" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 67 "de1:=diff(x(t),t)=4*x(t)+2*y(t):\nd e2:=diff(y(t),t)=-3*x(t)+11*y(t):" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 46 "opts:=color=black,linecolor=red,stepsize=0.05:" }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 48 "Grid:=dirgrid=[12,12],arrows =medium,thickness=2:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 132 "Iv ps:=[[x(0)=0.1,y(0)=0.05],[x(0)=0.2,y(0)=0.1],\n[x(0)=1,y(0)=3],[x(0)= 0.1,y(0)=0.3],[x(0)=-0.1,y(0)=-0.3],\n[x(0)=-0.1,y(0)=-0.05]]:" }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 99 "Rectangle:=t=-10..10,x=-10.. 10,y=-10..10,\ntitle=\"Phase portrait for example 2.2.4 [unstable node ]\":" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 55 "DEplot([de1,de2],[x (t),y(t)],Rectangle,Ivps,Grid,opts);" }}}}{MARK "8" 0 }{VIEWOPTS 1 1 0 1 1 1803 1 1 1 1 }{PAGENUMBERS 0 1 2 33 1 1 }