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Kustaanheimo-Stiefel transformation and 3-dimensional integrable Kepler billiards

Seminari di Analisi Matematica dell'Università e del Politecnico di Torino
Date: Wednesday, 04 October 2023 14:30 - 15:30

Venue: Lei Zhao - Aula 2 (Dipartimento di Matematica, Università di Torino)

It is known that any billiard system in a Kepler force field with a conic section focused at the Kepler center is integrable (Panov '94, Gallavotti-Jauslin '20, Takeuchi-Zhao '21). From this, it is not a surprise that by rotation this gives rise to integrable Kepler billiards in three dimensions. On the other hand, the 3-dimensional Kepler problem are linked to the 4-dimensional Hooke problem by a transformation due to Kustaanheimo and Stiefel. It is again not a surprise that integrable billiards within these force fields are related. In this talk, I shall discuss that the Hooke-Kepler billiard link by Kustaanheimo-Stiefel transformation suggests that there should be no non-rotational invariant 3-dimensional integrable Kepler billiards, and this is not so evident.Joint work with Airi Takeuchi from Augsburg.

 

Speaker
Lei Zhao
Affiliation
Università di Augsburg
Room
Aula 2
Proposed by
Irene De Blasi

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