0 1 2 3 4 5 0 -1 -2 -3 -4 -5 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 -0.2 -0.4 -0.6 -0.8 -1 x Errors in erf, 80-bit long double