AiryAi[z] gives the Airy function .
Mathematical function (see Section A.3.10).
The Airy function is a solution to the differential equation .
tends to zero as .
AiryAi[z] is an entire function of z with no branch cut discontinuities.
See The Mathematica Book: Section 3.2.10.
See also: AiryAiPrime, AiryBi, AiryBiPrime.