matrix solve(const matrix & vars, const matrix & rhs,
unsigned algo = solve_algo::automatic) const;
unsigned rank() const;
+ unsigned rank(unsigned solve_algo) const;
bool is_zero_matrix() const;
protected:
ex determinant_minor() const;
+ std::vector<unsigned> echelon_form(unsigned algo, int n);
int gauss_elimination(const bool det = false);
int division_free_elimination(const bool det = false);
int fraction_free_elimination(const bool det = false);
inline unsigned rank(const matrix & m)
{ return m.rank(); }
+inline unsigned rank(const matrix & m, unsigned solve_algo)
+{ return m.rank(solve_algo); }
// utility functions