APPENDIX C Error Functions
Errors are used in engineering and science applications when we deal with the Gaussian or normal probability density functions. As we observe in Chapter 7, error probabilities are often expressed in terms of the error function.
The error function of u, represented by erf(u), is given as
Another related function is the complementary error function, erfc(u), given as
The erf(u) and erfc(u) are related through
As u tends to infinity, erf(u) approaches unity, i.e.,
The following is the ...