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Complex number example

complex; nowait;
border(1,0,1,10) begin x:=t; y:=0; end;
border(1,0,1,10) begin x:=1; y:=t; end;
border(2,0,1,10) begin x:=1-t; y:=1; end;
border(1,0,1,10) begin x:=0; y:=1-t; end;
buildmesh(200);

solve(u)  /* observe than Re(u) = Im(u) */
begin
     onbdy(1,2) u=0;
      pde(u) id(u)-laplace(u)=1+I ;
end;
v=Im(u);
 plot(u);plot(v);plot(u-v);



Build Daemon 2001-10-22