Hν(2)⁡(z)=-ⅇ12⁢ν⁢π⁢ⅈπ⁢ⅈ⁢∫-∞∞ⅇ-ⅈ⁢z⁢cosh⁡t-ν⁢t⁢ⅆ⁡t,