Fn+p⁡(z)∼ⅇ-ⅈ⁢(ρ+α)⁢θ1+ⅇ-ⅈ⁢θ⁢ⅇ-ρ-z(2⁢π⁢ρ)1/2⁢∑s=0∞a2⁢s⁡(θ,α)ρs,