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+//=====================================================
+// File   :  action_hessenberg.hh
+// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
+//=====================================================
+//
+// 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 2
+// 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, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//
+#ifndef ACTION_HESSENBERG
+#define ACTION_HESSENBERG
+#include "utilities.h"
+#include "STL_interface.hh"
+#include <string>
+#include "init/init_function.hh"
+#include "init/init_vector.hh"
+#include "init/init_matrix.hh"
+
+using namespace std;
+
+template <class Interface>
+class Action_hessenberg {
+ public:
+  // Ctor
+
+  Action_hessenberg(int size) : _size(size) {
+    MESSAGE("Action_hessenberg Ctor");
+
+    // STL vector initialization
+    init_matrix<pseudo_random>(X_stl, _size);
+
+    init_matrix<null_function>(C_stl, _size);
+    init_matrix<null_function>(resu_stl, _size);
+
+    // generic matrix and vector initialization
+    Interface::matrix_from_stl(X_ref, X_stl);
+    Interface::matrix_from_stl(X, X_stl);
+    Interface::matrix_from_stl(C, C_stl);
+
+    _cost = 0;
+    for (int j = 0; j < _size - 2; ++j) {
+      double r = std::max(0, _size - j - 1);
+      double b = std::max(0, _size - j - 2);
+      _cost += 6 + 3 * b + r * r * 4 + r * _size * 4;
+    }
+  }
+
+  // invalidate copy ctor
+
+  Action_hessenberg(const Action_hessenberg&) {
+    INFOS("illegal call to Action_hessenberg Copy Ctor");
+    exit(1);
+  }
+
+  // Dtor
+
+  ~Action_hessenberg(void) {
+    MESSAGE("Action_hessenberg Dtor");
+
+    // deallocation
+    Interface::free_matrix(X_ref, _size);
+    Interface::free_matrix(X, _size);
+    Interface::free_matrix(C, _size);
+  }
+
+  // action name
+
+  static inline std::string name(void) { return "hessenberg_" + Interface::name(); }
+
+  double nb_op_base(void) { return _cost; }
+
+  inline void initialize(void) { Interface::copy_matrix(X_ref, X, _size); }
+
+  inline void calculate(void) { Interface::hessenberg(X, C, _size); }
+
+  void check_result(void) {
+    // calculation check
+    Interface::matrix_to_stl(C, resu_stl);
+
+    //     STL_interface<typename Interface::real_type>::hessenberg(X_stl,C_stl,_size);
+    //
+    //     typename Interface::real_type error=
+    //       STL_interface<typename Interface::real_type>::norm_diff(C_stl,resu_stl);
+    //
+    //     if (error>1.e-6){
+    //       INFOS("WRONG CALCULATION...residual=" << error);
+    //       exit(0);
+    //     }
+  }
+
+ private:
+  typename Interface::stl_matrix X_stl;
+  typename Interface::stl_matrix C_stl;
+  typename Interface::stl_matrix resu_stl;
+
+  typename Interface::gene_matrix X_ref;
+  typename Interface::gene_matrix X;
+  typename Interface::gene_matrix C;
+
+  int _size;
+  double _cost;
+};
+
+template <class Interface>
+class Action_tridiagonalization {
+ public:
+  // Ctor
+
+  Action_tridiagonalization(int size) : _size(size) {
+    MESSAGE("Action_tridiagonalization Ctor");
+
+    // STL vector initialization
+    init_matrix<pseudo_random>(X_stl, _size);
+
+    for (int i = 0; i < _size; ++i) {
+      for (int j = 0; j < i; ++j) X_stl[i][j] = X_stl[j][i];
+    }
+
+    init_matrix<null_function>(C_stl, _size);
+    init_matrix<null_function>(resu_stl, _size);
+
+    // generic matrix and vector initialization
+    Interface::matrix_from_stl(X_ref, X_stl);
+    Interface::matrix_from_stl(X, X_stl);
+    Interface::matrix_from_stl(C, C_stl);
+
+    _cost = 0;
+    for (int j = 0; j < _size - 2; ++j) {
+      double r = std::max(0, _size - j - 1);
+      double b = std::max(0, _size - j - 2);
+      _cost += 6. + 3. * b + r * r * 8.;
+    }
+  }
+
+  // invalidate copy ctor
+
+  Action_tridiagonalization(const Action_tridiagonalization&) {
+    INFOS("illegal call to Action_tridiagonalization Copy Ctor");
+    exit(1);
+  }
+
+  // Dtor
+
+  ~Action_tridiagonalization(void) {
+    MESSAGE("Action_tridiagonalization Dtor");
+
+    // deallocation
+    Interface::free_matrix(X_ref, _size);
+    Interface::free_matrix(X, _size);
+    Interface::free_matrix(C, _size);
+  }
+
+  // action name
+
+  static inline std::string name(void) { return "tridiagonalization_" + Interface::name(); }
+
+  double nb_op_base(void) { return _cost; }
+
+  inline void initialize(void) { Interface::copy_matrix(X_ref, X, _size); }
+
+  inline void calculate(void) { Interface::tridiagonalization(X, C, _size); }
+
+  void check_result(void) {
+    // calculation check
+    Interface::matrix_to_stl(C, resu_stl);
+
+    //     STL_interface<typename Interface::real_type>::tridiagonalization(X_stl,C_stl,_size);
+    //
+    //     typename Interface::real_type error=
+    //       STL_interface<typename Interface::real_type>::norm_diff(C_stl,resu_stl);
+    //
+    //     if (error>1.e-6){
+    //       INFOS("WRONG CALCULATION...residual=" << error);
+    //       exit(0);
+    //     }
+  }
+
+ private:
+  typename Interface::stl_matrix X_stl;
+  typename Interface::stl_matrix C_stl;
+  typename Interface::stl_matrix resu_stl;
+
+  typename Interface::gene_matrix X_ref;
+  typename Interface::gene_matrix X;
+  typename Interface::gene_matrix C;
+
+  int _size;
+  double _cost;
+};
+
+#endif