Put in std::sqrt

minimize.cc

@@ -373,7 +373,7 @@ void scg(ColumnVector& x,const gEvalFunction& func){
       if(kappa<eps){
 	break;
       }
-      sigma=sigma0/sqrt(kappa);
+      sigma=sigma0/std::sqrt(kappa);
       xplus = x + sigma*d;
       gplus=func.g_evaluate(xplus);gevals++;
       gamma = (d.t()*(gplus - gradnew)).AsScalar()/sigma;