1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
import graph; size(8cm,6cm,IgnoreAspect); pair S0=(4,0.2); pair S1=(2,3); pair S8=(0.5,0); xaxis("$S$"); yaxis(Label("$I$",0.5)); draw(S0{curl 0}..tension 1.5..S1{W}..tension 1.5..{curl 0}S8,Arrow(Fill,0.4)); draw((S1.x,0)..S1,dashed); draw((0,S1.y)..S1,dotted); labelx("$\frac{\gamma}{\beta}$",S1.x); labelx("$S_\infty$",S8.x); labely("$I_{\max}$",S1.y);