+ ex determinant_numeric(void) const;
+ ex determinant_minor_sparse(void) const;
+ ex determinant_minor_dense(void) const;
+ ex determinant_bareiss(void) const;
+ ex determinant_perm(void) const;
+ int gauss_elimination(void);
+ int fraction_free_elimination(void);
+ int division_free_elimination(void);
+ int pivot(unsigned ro, bool symbolic=true);
+private: // FIXME: these should be obsoleted