Error and Exponential Integral Functions
Using original algorithms developed at Wolfram Research, the Wolfram Language evaluates error and exponential integral functions anywhere in the complex plane, to arbitrary precision—as well as supporting series expansions with careful attention to branch cuts, and an extensive web of symbolic transformations.
Error Functions
Erf ▪ Erfc ▪ Erfi ▪ InverseErf ▪ InverseErfc ▪ DawsonF
Exponential Integrals
ExpIntegralE ▪ ExpIntegralEi ▪ LogIntegral
Fresnel Functions
FresnelS ▪ FresnelC ▪ FresnelF ▪ FresnelG