Jν⁡(x)=12⁢π⁢ⅈ⁢∫-ⅈ⁢∞ⅈ⁢∞Γ⁡(-t)⁢(12⁢x)ν+2⁢tΓ⁡(ν+t+1)⁢ⅆ⁡t,