\AiryAi @ 0 = - 1 3 1 / 3 \EulerGamma @ 1 3 \AiryAi @ 0 1 superscript 3 1 3 \EulerGamma @ 1 3 {\displaystyle{\displaystyle\AiryAi@{0}=-\frac{1}{3^{1/3}\EulerGamma@{\tfrac{1% }{3}}}}}