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Reversion Porisms in Conics

Lorenz Halbeisen, Norbert Hungerbühler, Marco Schiltknecht

4/8/21 Published in : arXiv:2108.07213

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.

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Semi-device-independent Certification of Causal Nonseparability with Trusted Quantum Inputs

The descendant colored Jones polynomials

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The National Centres of Competence in Research (NCCRs) are a funding scheme of the Swiss National Science Foundation

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