Fixed bug in proximal contribution in l1RelaxedProblem::compute_hessi…

…an_vector_product()

uno/reformulation/l1RelaxedProblem.cpp

@@ -121,7 +121,7 @@ namespace uno {
          for (size_t variable_index: Range(this->model.number_variables)) {
             const double scaling = std::min(1., 1./std::abs(this->proximal_center[variable_index]));
             const double proximal_term = this->proximal_coefficient * scaling * scaling;
-            result[variable_index] += proximal_term * x[variable_index] * x[variable_index];
+            result[variable_index] += proximal_term * x[variable_index];
          }
       }
    }