I$$s$$ Iv$=10($Max points: $3)$

Choose the complex potential that corresponds to the flow picture in the figure, where the solid line shows the current lines, the dotted line $-$ the lines of equal potential and the corresponding type of flow. $m>0$ is a real number, $z$ is a complex number

$w=\frac{m}{z}$

$w=-\frac{m}{2}lnz$

Vortex point

Runoff

Supplementary material:

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fig. $1$

$1$