message: Specify convergence docs.
diff: @@ -118,11 +118,13 @@ protected:
  ///@}
  /** @name Convergence
  + X denotes the space in which the norm is measured, whose choice depends
  + on the specific iterative solver.
  */
  ///@{
  int max_iter; //< Limit for the number of iterations the solver is allowed to do
  - double rel_tol; //< Convergence criterion: $ ||r|| <= rel_{tol}*||r_0|| $
  - double abs_tol; //< Convergence criterion: $ ||r|| <= abs_{tol} $
  + double rel_tol; //< Convergence criterion: $ ||r||_X <= rel_{tol}*||r_0||_X $
  + double abs_tol; //< Convergence criterion: $ ||r||_X <= abs_{tol} $
  ///@}
  /** @name Stats
  