Hν(2)⁡(z)=Γ⁡(12-ν)⁢(12⁢z)νπ32⁢ⅈ⁢∫1-ⅈ⁢∞(1+)ⅇ-ⅈ⁢z⁢t⁢(t2-1)ν-12⁢ⅆ⁡t,