This is documentation for Mathematica 4, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)



FilledSmallSquareExpIntegralEi[z] gives the exponential integral function .

FilledSmallSquare Mathematical function (see Section A.3.10).

FilledSmallSquare, where the principal value of the integral is taken.

FilledSmallSquareExpIntegralEi[z] has a branch cut discontinuity in the complex z plane running from to .

FilledSmallSquare See The Mathematica Book: Section 3.2.10.

FilledSmallSquare See also: ExpIntegralE, Erf, LogIntegral, SinIntegral, CosIntegral.

Further Examples