Reversion Porisms in Conics
Authors : Lorenz Halbeisen, Norbert Hungerbühler, Marco Schiltknecht
Pages : 371-382
Doi:10.36890/iejg.979088
View : 13 | Download : 6
Publication Date : 2021-10-29
Article Type : Research
Abstract :We give a projective proof of the butterfly porism for cyclic quadrilaterals and present a general reversion porism for polygons with an arbitrary number of vertices on a conic. We also investigate projective properties of the porisms.Keywords : Porisms, butterfly theorems, reversion map