47     Real thi = x.back();  in test_constant()  local
53         CHECK_ULP_CLOSE(Real(7), hermite_spline(thi), 2);  in test_constant()
55         CHECK_ULP_CLOSE(Real(0), hermite_spline.prime(thi), 2);  in test_constant()
57         thi = boost::math::nextafter(thi, std::numeric_limits<Real>::lowest());  in test_constant()
251     Real thi = x0 + (25-1)*dx;  in test_cardinal_constant()  local
257         CHECK_ULP_CLOSE(Real(7), hermite_spline(thi), 2);  in test_cardinal_constant()
259         CHECK_ULP_CLOSE(Real(7), hermite_spline_aos(thi), 2);  in test_cardinal_constant()
261         CHECK_ULP_CLOSE(Real(0), hermite_spline.prime(thi), 2);  in test_cardinal_constant()
263         CHECK_ULP_CLOSE(Real(0), hermite_spline_aos.prime(thi), 2);  in test_cardinal_constant()
266         thi = boost::math::nextafter(thi, std::numeric_limits<Real>::lowest());  in test_cardinal_constant()
318     Real thi = x0 + (45-1)*dx;  in test_cardinal_linear()  local
324         CHECK_ULP_CLOSE(Real(thi), hermite_spline(thi), 2);  in test_cardinal_linear()
326         CHECK_ULP_CLOSE(Real(1), hermite_spline.prime(thi), 2);  in test_cardinal_linear()
328         CHECK_ULP_CLOSE(Real(thi), hermite_spline_aos(thi), 2);  in test_cardinal_linear()
330         CHECK_ULP_CLOSE(Real(1), hermite_spline_aos.prime(thi), 2);  in test_cardinal_linear()
333         thi = boost::math::nextafter(thi, std::numeric_limits<Real>::lowest());  in test_cardinal_linear()
376     auto [tlo, thi] = s.domain();  in test_cardinal_quadratic()
382         CHECK_ULP_CLOSE(Real(thi*thi/2), s(thi), 3);  in test_cardinal_quadratic()
384         CHECK_ULP_CLOSE(Real(thi), s.prime(thi), 3);  in test_cardinal_quadratic()
386         CHECK_ULP_CLOSE(Real(thi*thi/2), saos(thi), 3);  in test_cardinal_quadratic()
388         CHECK_ULP_CLOSE(Real(thi), saos.prime(thi), 3);  in test_cardinal_quadratic()
391         thi = boost::math::nextafter(thi, std::numeric_limits<Real>::lowest());  in test_cardinal_quadratic()