English: Inversion with respect to a circle (in red here) maps circles (blue) that don't pass through its center to circles (magenta). However, circle's center is not mapped to respective circle's center. Instead, the image of the center is a limit of images of concentric circles, when their radii tend to zero.
Русский: Инверсия относительно окружности (красная) отображает окружности, не проходящие через её центр в окружности. Однако, центры окружностей при этом не переводятся в центры образов. К образу центра будут стремиться образы окружностей, концентрических с отображаемой окружностью при их радиусах, стремящихся к нулю.
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