Ln(α)⁡(x)=n12⁢α-14⁢ⅇ12⁢xπ12⁢x12⁢α+14⁢(cos⁡θn(α)⁡(x)⁢(∑m=0M-1am⁡(x)n12⁢m+O⁡(1n12⁢M))+sin⁡θn(α)⁡(x)⁢(∑m=1M-1bm⁡(x)n12⁢m+O⁡(1n12⁢M))),