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arXiv · 2102.05324

On FGLM Algorithms with Tate Algebras

Xavier Caruso·Tristan Vaccon·Thibaut Verron
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Abstract

Tate introduced in [Ta71] the notion of Tate algebras to serve, in the context of analytic geometry over the-adics, as a counterpart of polynomial algebras in classical algebraic geometry. In [CVV19, CVV20] the formalism of Gr{\"o}bner bases over Tate algebras has been introduced and advanced signature-based algorithms have been proposed. In the present article, we extend the FGLM algorithm of [FGLM93] to Tate algebras. Beyond allowing for fast change of ordering, this strategy has two other important benefits. First, it provides an efficient algorithm for changing the radii of convergence which, in particular, makes effective the bridge between the polynomial setting and the Tate setting and may help in speeding up the computation of Gr{\"o}bner basis over Tate algebras. Second, it gives the foundations for designing a fast algorithm for interreduction, which could serve as basic primitive in our previous algorithms and accelerate them significantly.

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Xavier Caruso, Tristan Vaccon, Thibaut Verron. 2021-02-10. On FGLM Algorithms with Tate Algebras. https://arxiv.org/abs/2102.05324

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