H2/3(2)⁡(ζ)=ⅇ2⁢π⁢ⅈ/3⁢H-2/3(2)⁡(ζ)=ⅇ-π⁢ⅈ/6⁢(3/z)⁢(Ai′⁡(-z)+ⅈ⁢Bi′⁡(-z)).