José L. Ramírez, Inversions in an ellipse,
Forum Geometricorum, 14 (2014) 107--115.
Abstract. In this paper we study the inversion in an ellipse which generalizes the classical inversion with respect to a circle and some properties. We also study the inversive images of lines, ellipses and other curves. Finally, we generalize the Pappus chain theorem to ellipses.
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