Ai ′ ( 0 ) = - 1 3 1 / 3 Γ ( 1 3 ) diffop Airy-Ai 1 0 1 superscript 3 1 3 Euler-Gamma 1 3 {\displaystyle{\displaystyle\mathrm{Ai}'\left(0\right)=-\frac{1}{3^{1/3}\Gamma% \left(\tfrac{1}{3}\right)}}}