g⁡(z)=ⅇ-π⁢ⅈ/4⁢(2⁢sin⁡α)-1/2⁢(ⅇ-ⅈ⁢α-z)-1/2+ⅇπ⁢ⅈ/4⁢(2⁢sin⁡α)-1/2⁢(ⅇⅈ⁢α-z)-1/2.