Γ⁡(a,z)=2⁢z12⁢a⁢ⅇ-zΓ⁡(1-a)⁢∫0∞ⅇ-t⁢t-12⁢a⁢Ka⁡(2⁢z⁢t)⁢ⅆ⁡t,