English

Blurred Complex Exponentiation

Logic 2019-11-19 v2

Abstract

It is shown that the complex field equipped with the "approximate exponential map", defined up to ambiguity from a small group, is quasiminimal: every automorphism-invariant subset of the field is countable or co-countable. If the ambiguity is taken to be from a subfield analogous to a field of constants then the resulting "blurred exponential field" is isomorphic to the result of an equivalent blurring of Zilber's exponential field, and to a suitable reduct of a differentially closed field. These results are progress towards Zilber's conjecture that the complex exponential field itself is quasiminimal. A key ingredient in the proofs is to prove the analogue of the exponential-algebraic closedness property using the density of the group governing the ambiguity with respect to the complex topology.

Keywords

Cite

@article{arxiv.1705.04574,
  title  = {Blurred Complex Exponentiation},
  author = {Jonathan Kirby},
  journal= {arXiv preprint arXiv:1705.04574},
  year   = {2019}
}

Comments

14 pages, v2, minor changes