z

k

映射

$\omega$

0

−1

$\omega =-\frac{z+R}{z-R}$

1

0

−2

$\omega =-2\frac{z+R}{z-R}$

2

$⋮$

$⋮$

$⋮$

$⋮$

0

−k

$\omega =-k\frac{z+R}{z-R}$

k