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+import graph;
+size(300,0);
+
+real f(real x) {return (x != 0.0) ? x * sin(1.0 / x) : 0.0;}
+pair F(real x) {return (x,f(x));}
+
+xaxis("$x$",red);
+yaxis(red);
+draw(graph(f,-1.2/pi,1.2/pi,1000));
+label("$x\sin\frac{1}{x}$",F(1.1/pi),NW);
+
+picture pic;
+size(pic,50,IgnoreAspect);
+xaxis(pic,red);
+yaxis(pic,red);
+draw(pic,graph(pic,f,-0.1/pi,0.1/pi,1000));
+
+add(new void(frame f, transform t) {
+ frame G=shift(point(f,N+0.85W))*align(bbox(pic,blue),10SE);
+ add(f,G);
+ draw(f,t*box(min(pic,user=true),max(pic,user=true)),blue);
+ draw(f,point(G,E)--t*point(pic,W),blue);
+ });
+