Kμ⁡(z)⁢Kν⁡(z)=18⁢π⁢ⅈ⁢∫c-ⅈ⁢∞c+ⅈ⁢∞Γ⁡(t+12⁢μ+12⁢ν)⁢Γ⁡(t+12⁢μ-12⁢ν)⁢Γ⁡(t-12⁢μ+12⁢ν)⁢Γ⁡(t-12⁢μ-12⁢ν)Γ⁡(2⁢t)⁢(12⁢z)-2⁢t⁢ⅆ⁡t,