... 19 76, Journal of Research of the National Bureau of Standards,vol. 80B, pp. 291–311; 1981,op. cit., vol. 86, pp. 66 1 68 6.Abramowitz, M., and Stegun, I.A. 1 964 ,Handbook of Mathematical Functions , ... tox/h,andx0≡n0h,x≡x−x0,andn≡n−n0,sothatF(x)≈1√πNn=−Nnodde−(x−nh)2n+ n0, (6. 10.4) 260 Chapter 6. Special Functions Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING ... (z)=i√π2e−z2[1 −erfc(−iz)] . (6. 10.2)A remarkable approximation for F (x), due to Rybicki[1],isF(z) = limh→01√πn odde−(z−nh)2n (6. 10.3)What makes equation (6. 10.3) unusual is that its...