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Source: det_by_minor
# ifndef CPPAD_DET_BY_MINOR_INCLUDED
# define CPPAD_DET_BY_MINOR_INCLUDED
 
# include <cppad/cppad.hpp>
# include <cppad/speed/det_of_minor.hpp>

// BEGIN CppAD namespace
namespace CppAD {

template <class Scalar>
class det_by_minor {
public:
	det_by_minor(size_t m) : m_(m) , r_(m + 1) , c_(m + 1), a_(m * m)
	{
		size_t i;

		// values for r and c that correspond to entire matrix
		for(i = 0; i < m; i++)
		{	r_[i] = i+1;
			c_[i] = i+1;
		}
		r_[m] = 0;
		c_[m] = 0;
	}

	template <class Vector>
	inline Scalar operator()(const Vector &x) const
	{	size_t i = m_ * m_;
		while(i--)
			a_[i] = x[i];
		return det_of_minor(a_, m_, m_, r_, c_); 
	}

private:
	size_t              m_;

	// made mutable because modified and then restored
	mutable std::vector<size_t> r_;
	mutable std::vector<size_t> c_;
	// make mutable because its value does not matter
	mutable std::vector<Scalar> a_;
};

} // END CppAD namespace
# endif

Input File: omh/det_by_minor_hpp.omh