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$$z \mapsto \frac{4}{z}$$ applied to an infinite stack of circles between the lines $$\{z:\operatorname{Re}(z)=1\}$$ and $$\{z:\operatorname{Re}(z)=2\}$$

Source code and more explanation: community.wolfram.com/groups/-

A Mastodon instance for maths people. The kind of people who make $$\pi z^2 \times a$$ jokes. Use $$ and $$ for inline LaTeX, and $ and $ for display mode.