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1 /*
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2 [auto_generated]
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3 boost/numeric/odeint/stepper/runge_kutta_fehlberg87.hpp
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4
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5 [begin_description]
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6 Implementation of the Runge-Kutta-Fehlberg stepper with the generic stepper.
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7 [end_description]
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8
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9 Copyright 2011-2013 Mario Mulansky
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10 Copyright 2012-2013 Karsten Ahnert
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11
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12 Distributed under the Boost Software License, Version 1.0.
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13 (See accompanying file LICENSE_1_0.txt or
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14 copy at http://www.boost.org/LICENSE_1_0.txt)
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15 */
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16
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17
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18 #ifndef BOOST_NUMERIC_ODEINT_STEPPER_RUNGE_KUTTA_FEHLBERG87_HPP_INCLUDED
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19 #define BOOST_NUMERIC_ODEINT_STEPPER_RUNGE_KUTTA_FEHLBERG87_HPP_INCLUDED
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20
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21
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22 #include <boost/fusion/container/vector.hpp>
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23 #include <boost/fusion/container/generation/make_vector.hpp>
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24
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25 #include <boost/numeric/odeint/stepper/explicit_error_generic_rk.hpp>
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26 #include <boost/numeric/odeint/algebra/range_algebra.hpp>
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27 #include <boost/numeric/odeint/algebra/default_operations.hpp>
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28 #include <boost/numeric/odeint/algebra/algebra_dispatcher.hpp>
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29 #include <boost/numeric/odeint/algebra/operations_dispatcher.hpp>
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30
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31 #include <boost/array.hpp>
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32
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33 #include <boost/numeric/odeint/util/state_wrapper.hpp>
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34 #include <boost/numeric/odeint/util/is_resizeable.hpp>
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35 #include <boost/numeric/odeint/util/resizer.hpp>
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36
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37
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38
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39
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40 namespace boost {
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41 namespace numeric {
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42 namespace odeint {
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43
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44
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45 #ifndef DOXYGEN_SKIP
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46 template< class Value = double >
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47 struct rk78_coefficients_a1 : boost::array< Value , 1 >
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48 {
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49 rk78_coefficients_a1( void )
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50 {
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51 (*this)[0] = static_cast< Value >( 2 )/static_cast< Value >( 27 );
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52 }
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53 };
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54
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55 template< class Value = double >
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56 struct rk78_coefficients_a2 : boost::array< Value , 2 >
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57 {
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58 rk78_coefficients_a2( void )
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59 {
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60 (*this)[0] = static_cast< Value >( 1 )/static_cast< Value >( 36 );
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61 (*this)[1] = static_cast< Value >( 1 )/static_cast< Value >( 12 );
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62 }
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63 };
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64
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65
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66 template< class Value = double >
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67 struct rk78_coefficients_a3 : boost::array< Value , 3 >
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68 {
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69 rk78_coefficients_a3( void )
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70 {
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71 (*this)[0] = static_cast< Value >( 1 )/static_cast< Value >( 24 );
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72 (*this)[1] = static_cast< Value >( 0 );
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73 (*this)[2] = static_cast< Value >( 1 )/static_cast< Value >( 8 );
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74 }
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75 };
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76
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77 template< class Value = double >
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78 struct rk78_coefficients_a4 : boost::array< Value , 4 >
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79 {
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80 rk78_coefficients_a4( void )
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81 {
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82 (*this)[0] = static_cast< Value >( 5 )/static_cast< Value >( 12 );
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83 (*this)[1] = static_cast< Value >( 0 );
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84 (*this)[2] = static_cast< Value >( -25 )/static_cast< Value >( 16 );
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85 (*this)[3] = static_cast< Value >( 25 )/static_cast< Value >( 16 );
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86 }
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87 };
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88
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89 template< class Value = double >
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90 struct rk78_coefficients_a5 : boost::array< Value , 5 >
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91 {
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92 rk78_coefficients_a5( void )
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93 {
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94 (*this)[0] = static_cast< Value >( 1 )/static_cast< Value >( 20 );
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95 (*this)[1] = static_cast< Value >( 0 );
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96 (*this)[2] = static_cast< Value >( 0 );
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97 (*this)[3] = static_cast< Value >( 1 )/static_cast< Value >( 4 );
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98 (*this)[4] = static_cast< Value >( 1 )/static_cast< Value >( 5 );
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99 }
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100 };
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101
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102
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103 template< class Value = double >
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104 struct rk78_coefficients_a6 : boost::array< Value , 6 >
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105 {
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106 rk78_coefficients_a6( void )
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107 {
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108 (*this)[0] = static_cast< Value >( -25 )/static_cast< Value >( 108 );
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109 (*this)[1] = static_cast< Value >( 0 );
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110 (*this)[2] = static_cast< Value >( 0 );
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111 (*this)[3] = static_cast< Value >( 125 )/static_cast< Value >( 108 );
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112 (*this)[4] = static_cast< Value >( -65 )/static_cast< Value >( 27 );
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113 (*this)[5] = static_cast< Value >( 125 )/static_cast< Value >( 54 );
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114 }
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115 };
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116
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117 template< class Value = double >
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118 struct rk78_coefficients_a7 : boost::array< Value , 7 >
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119 {
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120 rk78_coefficients_a7( void )
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121 {
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122 (*this)[0] = static_cast< Value >( 31 )/static_cast< Value >( 300 );
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123 (*this)[1] = static_cast< Value >( 0 );
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124 (*this)[2] = static_cast< Value >( 0 );
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125 (*this)[3] = static_cast< Value >( 0 );
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126 (*this)[4] = static_cast< Value >( 61 )/static_cast< Value >( 225 );
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127 (*this)[5] = static_cast< Value >( -2 )/static_cast< Value >( 9 );
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128 (*this)[6] = static_cast< Value >( 13 )/static_cast< Value >( 900 );
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129 }
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130 };
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131
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132 template< class Value = double >
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133 struct rk78_coefficients_a8 : boost::array< Value , 8 >
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134 {
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135 rk78_coefficients_a8( void )
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136 {
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137 (*this)[0] = static_cast< Value >( 2 );
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138 (*this)[1] = static_cast< Value >( 0 );
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139 (*this)[2] = static_cast< Value >( 0 );
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140 (*this)[3] = static_cast< Value >( -53 )/static_cast< Value >( 6 );
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141 (*this)[4] = static_cast< Value >( 704 )/static_cast< Value >( 45 );
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142 (*this)[5] = static_cast< Value >( -107 )/static_cast< Value >( 9 );
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143 (*this)[6] = static_cast< Value >( 67 )/static_cast< Value >( 90 );
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144 (*this)[7] = static_cast< Value >( 3 );
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145 }
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146 };
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147
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148 template< class Value = double >
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149 struct rk78_coefficients_a9 : boost::array< Value , 9 >
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150 {
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151 rk78_coefficients_a9( void )
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152 {
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153 (*this)[0] = static_cast< Value >( -91 )/static_cast< Value >( 108 );
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154 (*this)[1] = static_cast< Value >( 0 );
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155 (*this)[2] = static_cast< Value >( 0 );
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156 (*this)[3] = static_cast< Value >( 23 )/static_cast< Value >( 108 );
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157 (*this)[4] = static_cast< Value >( -976 )/static_cast< Value >( 135 );
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158 (*this)[5] = static_cast< Value >( 311 )/static_cast< Value >( 54 );
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159 (*this)[6] = static_cast< Value >( -19 )/static_cast< Value >( 60 );
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160 (*this)[7] = static_cast< Value >( 17 )/static_cast< Value >( 6 );
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161 (*this)[8] = static_cast< Value >( -1 )/static_cast< Value >( 12 );
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162 }
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163 };
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164
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165 template< class Value = double >
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166 struct rk78_coefficients_a10 : boost::array< Value , 10 >
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167 {
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168 rk78_coefficients_a10( void )
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169 {
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170 (*this)[0] = static_cast< Value >( 2383 )/static_cast< Value >( 4100 );
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171 (*this)[1] = static_cast< Value >( 0 );
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172 (*this)[2] = static_cast< Value >( 0 );
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173 (*this)[3] = static_cast< Value >( -341 )/static_cast< Value >( 164 );
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174 (*this)[4] = static_cast< Value >( 4496 )/static_cast< Value >( 1025 );
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175 (*this)[5] = static_cast< Value >( -301 )/static_cast< Value >( 82 );
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176 (*this)[6] = static_cast< Value >( 2133 )/static_cast< Value >( 4100 );
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177 (*this)[7] = static_cast< Value >( 45 )/static_cast< Value >( 82 );
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178 (*this)[8] = static_cast< Value >( 45 )/static_cast< Value >( 164 );
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179 (*this)[9] = static_cast< Value >( 18 )/static_cast< Value >( 41 );
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180 }
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181 };
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182
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183 template< class Value = double >
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184 struct rk78_coefficients_a11 : boost::array< Value , 11 >
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185 {
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186 rk78_coefficients_a11( void )
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187 {
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188 (*this)[0] = static_cast< Value >( 3 )/static_cast< Value >( 205 );
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189 (*this)[1] = static_cast< Value >( 0 );
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190 (*this)[2] = static_cast< Value >( 0 );
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191 (*this)[3] = static_cast< Value >( 0 );
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192 (*this)[4] = static_cast< Value >( 0 );
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193 (*this)[5] = static_cast< Value >( -6 )/static_cast< Value >( 41 );
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194 (*this)[6] = static_cast< Value >( -3 )/static_cast< Value >( 205 );
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195 (*this)[7] = static_cast< Value >( -3 )/static_cast< Value >( 41 );
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196 (*this)[8] = static_cast< Value >( 3 )/static_cast< Value >( 41 );
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197 (*this)[9] = static_cast< Value >( 6 )/static_cast< Value >( 41 );
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198 (*this)[10] = static_cast< Value >( 0 );
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199 }
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200 };
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201
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202 template< class Value = double >
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203 struct rk78_coefficients_a12 : boost::array< Value , 12 >
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204 {
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205 rk78_coefficients_a12( void )
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206 {
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207 (*this)[0] = static_cast< Value >( -1777 )/static_cast< Value >( 4100 );
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208 (*this)[1] = static_cast< Value >( 0 );
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209 (*this)[2] = static_cast< Value >( 0 );
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210 (*this)[3] = static_cast< Value >( -341 )/static_cast< Value >( 164 );
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211 (*this)[4] = static_cast< Value >( 4496 )/static_cast< Value >( 1025 );
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212 (*this)[5] = static_cast< Value >( -289 )/static_cast< Value >( 82 );
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213 (*this)[6] = static_cast< Value >( 2193 )/static_cast< Value >( 4100 );
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214 (*this)[7] = static_cast< Value >( 51 )/static_cast< Value >( 82 );
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215 (*this)[8] = static_cast< Value >( 33 )/static_cast< Value >( 164 );
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216 (*this)[9] = static_cast< Value >( 12 )/static_cast< Value >( 41 );
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217 (*this)[10] = static_cast< Value >( 0 );
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218 (*this)[11] = static_cast< Value >( 1 );
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219 }
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220 };
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221
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222 template< class Value = double >
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223 struct rk78_coefficients_b : boost::array< Value , 13 >
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224 {
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225 rk78_coefficients_b( void )
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226 {
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227 (*this)[0] = static_cast< Value >( 0 );
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228 (*this)[1] = static_cast< Value >( 0 );
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229 (*this)[2] = static_cast< Value >( 0 );
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230 (*this)[3] = static_cast< Value >( 0 );
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231 (*this)[4] = static_cast< Value >( 0 );
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232 (*this)[5] = static_cast< Value >( 34 )/static_cast<Value>( 105 );
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233 (*this)[6] = static_cast< Value >( 9 )/static_cast<Value>( 35 );
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234 (*this)[7] = static_cast< Value >( 9 )/static_cast<Value>( 35 );
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235 (*this)[8] = static_cast< Value >( 9 )/static_cast<Value>( 280 );
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236 (*this)[9] = static_cast< Value >( 9 )/static_cast<Value>( 280 );
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237 (*this)[10] = static_cast< Value >( 0 );
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238 (*this)[11] = static_cast< Value >( 41 )/static_cast<Value>( 840 );
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239 (*this)[12] = static_cast< Value >( 41 )/static_cast<Value>( 840 );
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240 }
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241 };
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242
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243 template< class Value = double >
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244 struct rk78_coefficients_db : boost::array< Value , 13 >
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245 {
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246 rk78_coefficients_db( void )
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247 {
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248 (*this)[0] = static_cast< Value >( 0 ) - static_cast< Value >( 41 )/static_cast<Value>( 840 );
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249 (*this)[1] = static_cast< Value >( 0 );
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250 (*this)[2] = static_cast< Value >( 0 );
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251 (*this)[3] = static_cast< Value >( 0 );
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252 (*this)[4] = static_cast< Value >( 0 );
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253 (*this)[5] = static_cast< Value >( 0 );
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254 (*this)[6] = static_cast< Value >( 0 );
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255 (*this)[7] = static_cast< Value >( 0 );
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256 (*this)[8] = static_cast< Value >( 0 );
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257 (*this)[9] = static_cast< Value >( 0 );
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258 (*this)[10] = static_cast< Value >( 0 ) - static_cast< Value >( 41 )/static_cast<Value>( 840 );
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259 (*this)[11] = static_cast< Value >( 41 )/static_cast<Value>( 840 );
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260 (*this)[12] = static_cast< Value >( 41 )/static_cast<Value>( 840 );
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261 }
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262 };
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263
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264
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265 template< class Value = double >
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266 struct rk78_coefficients_c : boost::array< Value , 13 >
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267 {
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268 rk78_coefficients_c( void )
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269 {
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270 (*this)[0] = static_cast< Value >( 0 );
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271 (*this)[1] = static_cast< Value >( 2 )/static_cast< Value >( 27 );
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272 (*this)[2] = static_cast< Value >( 1 )/static_cast< Value >( 9 );
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273 (*this)[3] = static_cast< Value >( 1 )/static_cast<Value>( 6 );
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274 (*this)[4] = static_cast< Value >( 5 )/static_cast<Value>( 12 );
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275 (*this)[5] = static_cast< Value >( 1 )/static_cast<Value>( 2 );
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276 (*this)[6] = static_cast< Value >( 5 )/static_cast<Value>( 6 );
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277 (*this)[7] = static_cast< Value >( 1 )/static_cast<Value>( 6 );
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278 (*this)[8] = static_cast< Value >( 2 )/static_cast<Value>( 3 );
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279 (*this)[9] = static_cast< Value >( 1 )/static_cast<Value>( 3 );
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280 (*this)[10] = static_cast< Value >( 1 );
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281 (*this)[11] = static_cast< Value >( 0 );
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282 (*this)[12] = static_cast< Value >( 1 );
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283 }
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284 };
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285 #endif // DOXYGEN_SKIP
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286
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287
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288
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289
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290
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291 template<
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292 class State ,
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293 class Value = double ,
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294 class Deriv = State ,
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295 class Time = Value ,
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296 class Algebra = typename algebra_dispatcher< State >::algebra_type ,
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297 class Operations = typename operations_dispatcher< State >::operations_type ,
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298 class Resizer = initially_resizer
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299 >
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300 #ifndef DOXYGEN_SKIP
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301 class runge_kutta_fehlberg78 : public explicit_error_generic_rk< 13 , 8 , 8 , 7 , State , Value , Deriv , Time ,
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302 Algebra , Operations , Resizer >
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303 #else
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304 class runge_kutta_fehlberg78 : public explicit_error_generic_rk
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305 #endif
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306 {
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307
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308 public:
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309 #ifndef DOXYGEN_SKIP
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310 typedef explicit_error_generic_rk< 13 , 8 , 8 , 7 , State , Value , Deriv , Time ,
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311 Algebra , Operations , Resizer > stepper_base_type;
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312 #endif
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313 typedef typename stepper_base_type::state_type state_type;
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314 typedef typename stepper_base_type::value_type value_type;
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315 typedef typename stepper_base_type::deriv_type deriv_type;
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316 typedef typename stepper_base_type::time_type time_type;
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317 typedef typename stepper_base_type::algebra_type algebra_type;
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318 typedef typename stepper_base_type::operations_type operations_type;
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319 typedef typename stepper_base_type::resizer_type resizer_type;
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320
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321 #ifndef DOXYGEN_SKIP
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322 typedef typename stepper_base_type::stepper_type stepper_type;
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323 typedef typename stepper_base_type::wrapped_state_type wrapped_state_type;
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324 typedef typename stepper_base_type::wrapped_deriv_type wrapped_deriv_type;
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325 #endif // DOXYGEN_SKIP
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326
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327
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328 runge_kutta_fehlberg78( const algebra_type &algebra = algebra_type() ) : stepper_base_type(
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329 boost::fusion::make_vector( rk78_coefficients_a1<Value>() , rk78_coefficients_a2<Value>() , rk78_coefficients_a3<Value>() ,
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330 rk78_coefficients_a4<Value>() , rk78_coefficients_a5<Value>() , rk78_coefficients_a6<Value>() ,
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331 rk78_coefficients_a7<Value>() , rk78_coefficients_a8<Value>() , rk78_coefficients_a9<Value>() ,
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332 rk78_coefficients_a10<Value>() , rk78_coefficients_a11<Value>() , rk78_coefficients_a12<Value>() ) ,
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333 rk78_coefficients_b<Value>() , rk78_coefficients_db<Value>() , rk78_coefficients_c<Value>() , algebra )
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334 { }
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335 };
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336
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337
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338
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339 /************* DOXYGEN *************/
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340
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341 /**
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342 * \class runge_kutta_fehlberg78
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343 * \brief The Runge-Kutta Fehlberg 78 method.
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344 *
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345 * The Runge-Kutta Fehlberg 78 method is a standard method for high-precision applications.
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346 * The method is explicit and fulfills the Error Stepper concept. Step size control
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347 * is provided but continuous output is not available for this method.
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348 *
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349 * This class derives from explicit_error_stepper_base and inherits its interface via CRTP (current recurring template pattern).
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350 * Furthermore, it derivs from explicit_error_generic_rk which is a generic Runge-Kutta algorithm with error estimation.
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351 * For more details see explicit_error_stepper_base and explicit_error_generic_rk.
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352 *
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353 * \tparam State The state type.
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354 * \tparam Value The value type.
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355 * \tparam Deriv The type representing the time derivative of the state.
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356 * \tparam Time The time representing the independent variable - the time.
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357 * \tparam Algebra The algebra type.
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358 * \tparam Operations The operations type.
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359 * \tparam Resizer The resizer policy type.
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360 */
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361
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362
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363 /**
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364 * \fn runge_kutta_fehlberg78::runge_kutta_fehlberg78( const algebra_type &algebra )
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365 * \brief Constructs the runge_kutta_cash_fehlberg78 class. This constructor can be used as a default
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366 * constructor if the algebra has a default constructor.
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367 * \param algebra A copy of algebra is made and stored inside explicit_stepper_base.
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368 */
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369
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370 }
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371 }
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372 }
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373
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374 #endif //BOOST_NUMERIC_ODEINT_STEPPER_RUNGE_KUTTA_FEHLBERG87_HPP_INCLUDED
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