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diff --git a/GudhUI/utils/Edge_contractor.h b/GudhUI/utils/Edge_contractor.h
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-/* This file is part of the Gudhi Library. The Gudhi library 
- *    (Geometric Understanding in Higher Dimensions) is a generic C++ 
- *    library for computational topology.
- *
- *    Author(s):       David Salinas
- *
- *    Copyright (C) 2014 Inria
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU General Public License as published by
- *    the Free Software Foundation, either version 3 of the License, or
- *    (at your option) any later version.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU General Public License for more details.
- *
- *    You should have received a copy of the GNU General Public License
- *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
- * 
- */
-
-#ifndef UTILS_EDGE_CONTRACTOR_H_
-#define UTILS_EDGE_CONTRACTOR_H_
-
-
-#include <gudhi/Skeleton_blocker_contractor.h>
-#include <gudhi/Contraction/Edge_profile.h>
-#include <gudhi/Contraction/policies/Cost_policy.h>
-
-#include <vector>
-
-/**
- * Iteratively puts every vertex at the center of its neighbors
- */
-template<typename SkBlComplex> class Edge_contractor {
- private:
-  SkBlComplex& complex_;
-  unsigned num_contractions_;
-
-  /**
-   * @brief return a cost corresponding to the squared length of the edge
-   */
-  template< typename EdgeProfile> class Length_cost : public contraction::Cost_policy<EdgeProfile> {
-   public:
-    typedef typename contraction::Cost_policy<EdgeProfile>::Cost_type Cost_type;
-    typedef typename EdgeProfile::Point Point;
-
-    Cost_type operator()(const EdgeProfile& profile, const boost::optional<Point>& placement) const override {
-      Cost_type res;
-      if (!placement)
-        return res;
-      return Geometry_trait::Squared_distance_d()(profile.p0(), profile.p1());  // not working??
-    }
-  };
-
-  /**
-   * @brief return a cost corresponding to the squared length of the edge
-   */
-  template< typename EdgeProfile> class Middle_placement : public contraction::Placement_policy<EdgeProfile> {
-   public:
-    typedef typename contraction::Placement_policy<EdgeProfile>::Placement_type Placement_type;
-    typedef typename EdgeProfile::Point Point;
-
-    Placement_type operator()(const EdgeProfile& profile) const override {
-      std::vector<double> mid_coords(profile.p0().dimension(), 0);
-      for (int i = 0; i < profile.p0().dimension(); ++i) {
-        mid_coords[i] = (profile.p0()[i] + profile.p1()[i]) / 2.;
-      }
-      return Point(profile.p0().dimension(), mid_coords.begin(), mid_coords.end());
-    }
-  };
-
- public:
-  typedef typename SkBlComplex::Vertex_handle Vertex_handle;
-  typedef typename SkBlComplex::Edge_handle Edge_handle;
-
-  /**
-   * @brief Modify complex to be the expansion of the k-nearest neighbor
-   * symetric graph.
-   */
-  Edge_contractor(SkBlComplex& complex, unsigned num_contractions) :
-      complex_(complex), num_contractions_(num_contractions) {
-    typedef typename contraction::Edge_profile<Complex> Profile;
-    num_contractions = (std::min)(static_cast<int>(num_contractions), static_cast<int>(complex_.num_vertices() - 1));
-    typedef typename contraction::Skeleton_blocker_contractor<Complex> Contractor;
-    Contractor contractor(complex_,
-                          new Length_cost<contraction::Edge_profile < Complex >> (),
-                          new Middle_placement<contraction::Edge_profile < Complex >> (),
-                          contraction::make_link_valid_contraction<Profile>(),
-                          contraction::make_remove_popable_blockers_visitor<Profile>());
-    contractor.contract_edges(num_contractions);
-  }
-};
-
-#endif  // UTILS_EDGE_CONTRACTOR_H_