Rational Chebyshev Approximations for the Error Function

W. J. Cody
1969 Mathematics of Computation  
This note presents nearly-best rational approximations ftir the functions erf (i) and erfc (x), with maximal relative errors ranging down to between 6
doi:10.2307/2004390 fatcat:hxghynv3c5h7hbaknmhb225lda