DLMF:

Figure 4.2.1 (See in context.)

Figure 4.2.1: $z$ -plane: Branch cut for $\mathop{\ln\/}\nolimits z$ and $z^{\alpha}$ .

Symbols:: $\mathop{\ln\/}\nolimits z$ : principal branch of logarithm function and $z$ : complex variable
Keywords:: branch cut, logarithm function, power function
Permalink:: http://dlmf.nist.gov/4.2.F1.mag
Encodings:: Magnified png, pdf