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arXiv · 2109.06345

Kolmogorov variation: KAM with knobs (\`a la Kolmogorov)

Marco Sansottera·Veronica Danesi
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Abstract

In this paper we reconsider the original Kolmogorov normal form algorithm with a variation on the handling of the frequencies. At difference with respect to the Kolmogorov approach, we do not keep the frequencies fixed along the normalization procedure. Besides, we select the frequencies of the final invariant torus and determine a posteriori the corresponding starting ones. In particular, we replace the classical translation step with a change of the frequencies. The algorithm is based on the original scheme of Kolmogorov, thus exploiting the fast convergence of the Newton-Kantorovich method.

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Marco Sansottera, Veronica Danesi. 2021-09-13. Kolmogorov variation: KAM with knobs (\`a la Kolmogorov). https://arxiv.org/abs/2109.06345

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