Eν⁡(z)∼-Yν⁡(z)-1+cos⁡(π⁢ν)π⁢z⁢∑k=0∞Fk⁢(ν)z2⁢k-ν⁢(1-cos⁡(π⁢ν))π⁢z2⁢∑k=0∞Gk⁢(ν)z2⁢k,