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<asy>
import graph;
size(200,IgnoreAspect);

real f(real x) {return sin(x);};

bool3 branch(real x)
{
  static int lastsign=0;
  //if(x == 0) return false;
  int sign=sgn(x);
  bool b=lastsign == 0 || sign == lastsign; 
  lastsign=sign;
  return b ? true : default;
}

draw(graph(f,0.000001,2*pi,branch));
axes("$x$","$y$",black);
</asy>

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Nikita2/sandbox. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Nikita2/sandbox&oldid=29091

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