DLMF:

Figure 8.3.15 (See in context.)

Figure 8.3.15: $\mathop{\gamma\/}\nolimits\!\left(2.5,x+iy\right)$ , $-2.2\leq x\leq 3$ , $-3\leq y\leq 3$ . Principal value. There is a cut along the negative real axis.

Annotations:

Symbols:: $\mathop{\gamma\/}\nolimits\!\left(a,z\right)$ : incomplete gamma function and : real variable
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