DLMF:

Figure 14.22.2 (See in context.)

Figure 14.22.2: $\mathop{P^{{-\ifrac{1}{2}}}_{{\ifrac{1}{2}}}\/}\nolimits\!\left(x+iy\right),-5% \leq x\leq 5,-5\leq y\leq 5$ . There is a cut along the real axis from $-\infty$ to 1.

Annotations:

Symbols:: $\mathop{P^{{\mu}}_{{\nu}}\/}\nolimits\!\left(z\right)$ : associated Legendre function of the first kind
Permalink:: http://dlmf.nist.gov/14.22.F2.mag
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