English

Michael's selection theorem in general d-minimal structures

Logic 2024-04-10 v2

Abstract

Thamrongthanyalak demonstrated a definable version of Michael's selection theorem in d-minimal expansions of the real field. We generalize this result to the case in which the structures are d-minimal expansions of ordered fields F=(F,<,+,,0,1,)\mathcal F=(F,<,+,\cdot,0,1,\ldots). We also show that we can choose a definable continuous selection ff of a lower semi-continuous map T:EFT:E \rightrightarrows F so that f(x)f(x) is contained in the interior of T(x)T(x) when the interior is not empty.

Keywords

Cite

@article{arxiv.2402.14222,
  title  = {Michael's selection theorem in general d-minimal structures},
  author = {Masato Fujita},
  journal= {arXiv preprint arXiv:2402.14222},
  year   = {2024}
}

Comments

arXiv admin note: text overlap with arXiv:2110.15613, arXiv:2311.08699

R2 v1 2026-06-28T14:56:33.339Z