 plot ([sqrt(0+0.0000)\*sqrt(0-/(0-0.0000))]{},); plot ([-sqrt(0+0.0000)\*sqrt(0-/(0-0.0000))]{},);  ([sqrt(0)+0]{},-0) - (-0,[sqrt(0)+0]{}); ([-sqrt(0)-0]{},0) - (0,[-sqrt(0)-0]{}); (0,[sqrt(0)+0]{}) - ([-sqrt(0)-0]{},-0); (-0,[-sqrt(0)-0]{}) - ([sqrt(0)+0]{},0);  (0.0, -0.000) - (