On Rigidity of Lattice of Topologies Containing Vector Topologies on Vector Spaces
Abstract
A vector topology on a vector space over a topological field is a (not necessarily Hausdorff) topology by which the addition and scalar multiplication are continuous. We prove that, if an isomorphism between the lattice of topologies of two vector spaces preserves vector topologies, then the isomorphism is induced by a translation, a semilinear isomorphism and the complement map. As a consequence, if such an isomorphism exists, the coefficient fields are isomorphic as topological fields and these vector spaces have the same dimension. We also prove a similar rigidity result for an isomorphism between the lattice of vector topologies which preserves Hausdorff vector topologies. These results are obtained by using the fundamental theorems of affine and projective geometries.
Keywords
Cite
@article{arxiv.2303.11383,
title = {On Rigidity of Lattice of Topologies Containing Vector Topologies on Vector Spaces},
author = {Takanobu Aoyama},
journal= {arXiv preprint arXiv:2303.11383},
year = {2025}
}
Comments
17 pages. By using the fundamental theorem of affine geometry, we shorten the proof of Theorem 3.1