Strict ordering conjecture for billiard winding numbers in ellipsoids

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Let m0,…,mn−1m_0,\ldots,m_{n-1} be the winding numbers of a periodic billiard trajectory inside an ellipsoid, as defined by the oscillations of its elliptic coordinates. Winding-number ordering conjecture. Winding numbers are always ordered in a strict decreasing way:

2≤mn−1<⋯<m1<m0.2 \leq m_{n-1} < \cdots < m_1 < m_0.

This conjecture was stated in earlier work and tested numerically. The supplied text gives no resolution, so its general status remains open.

References

Primary source

Rafael Ramirez-Ros, “On Cayley conditions for billiards inside ellipsoids”, arXiv:1211.6557 (2012).

Additional references

2 papers in this index state this conjecture (2010–2012). The statement above is taken from the most recent of them; the others are arXiv:1004.5499.

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