Generic stability conjecture for definable groups over valuation rings

Let OK{\mathcal O}_\mathbb{K} be the valuation ring of a field with residue map res\operatorname{res}, and let GOKnG\subseteq {\mathcal O}_\mathbb{K}^n be a \emptyset-definable group. Write G00G^{00} for the smallest type-definable subgroup of bounded index, and let SG(K)S_G(\mathbb{K}) denote the space of types on GG over K\mathbb{K}. For a type pSG(K)p\in S_G(\mathbb{K}), let res(p)\operatorname{res}(p) be its image under the residue map. Generic stability conjecture. (i) GG is generically stable. (ii) G00G^{00} is a finite-index subgroup of GG. (iii) If pSG(K)p\in S_G(\mathbb{K}) is generically stable, then pp is dominated by res(p)\operatorname{res}(p). This conjecture extends the preceding results for linear algebraic groups over OK{\mathcal O}_\mathbb{K}, such as SL(n,OK)\mathrm{SL}(n,{\mathcal O}_\mathbb{K}) and SO(n,OK)\mathrm{SO}(n,{\mathcal O}_\mathbb{K}). It predicts generic stability, finite index of the connected component, and residue domination for arbitrary \emptyset-definable groups of this form; the supplied text does not state a resolution.

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Primary source

Chen Ling and Ningyuan Yao, “Generic stability of linear algebraic groups over C[[t]]”, arXiv:2307.05546 (2023).

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