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Comment on: "St\"{a}ckel and Eisenhart lifts, Haantjes geometry and Gravitation"
A. V. Tsiganov
https://arxiv.org/abs/2511.05765 https://arxiv.org/pdf/2511.05765 https://arxiv.org/html/2511.05765
arXiv:2511.05765v1 Announce Type: new
Abstract: One of the oldest methods for constructing integrable Hamiltonian systems, proposed by Jacobi, recently is being presented as a novel St\"{a}ckel lift construction related with Haantjes geometry. It may cause some confusion.
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