Characterization of (N,0)(\mathcal N,0)-ats semialgebraic sets

A semialgebraic set \EuScriptTRn\EuScript T\subset\mathbb R^n is locally connected by analytic paths if, for every x\EuScriptTx\in\EuScript T and every open semialgebraic neighborhood UxRnU^x\subset\mathbb R^n of xx, there is an open semialgebraic neighborhood WxUxW^x\subset U^x of xx such that \EuScriptTWx\EuScript T\cap W^x is connected by analytic paths. The characterization conjecture. A semialgebraic set \EuScriptTRn\EuScript T\subset\mathbb R^n is an ((N,0),ats)((\mathcal N,0),\mathrm{ats}) if and only if \EuScriptT\EuScript T is locally connected by analytic paths. The result is presented as a desired generalization of the paper's theorem for Nash manifolds with corners; the authors specifically hope to prove it when μ=0\mu=0, and no resolution is supplied here.

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Primary source

Antonio Carbone and José F. Fernando, “Nash approximation of differentiable semialgebraic maps”, arXiv:2601.13164 (2026).

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