DLMF:

Figure 10.21.2 (See in context.)

Figure 10.21.2: Zeros $\bullet\bullet\bullet$ of $\mathop{{H^{{(1)}}_{{n}}}\/}\nolimits\!\left(nz\right)$ in $|\mathop{\mathrm{ph}\/}\nolimits z|\leq\pi$ . Case

, $-2.8\leq\realpart{z}\leq 1.4$ .

Annotations:

Symbols:: $\mathop{{H^{{(1)}}_{{\nu}}}\/}\nolimits\!\left(z\right)$ : Bessel function of the third kind (or Hankel function), $\mathop{\mathrm{ph}\/}\nolimits$ : phase, $\realpart{}$ : real part, : integer and : complex variable
Permalink:: http://dlmf.nist.gov/10.21.F2.mag
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