42 return boost::numeric::interval_lib::constants::pi_half_lower<FloatNum>();
46 return boost::numeric::interval_lib::constants::pi_half_upper<FloatNum>();
50 return boost::numeric::interval_lib::constants::pi_lower<FloatNum>();
54 return boost::numeric::interval_lib::constants::pi_upper<FloatNum>();
58 return boost::numeric::interval_lib::constants::pi_twice_lower<FloatNum>();
62 return boost::numeric::interval_lib::constants::pi_twice_upper<FloatNum>();