English

The functor between two categories of $\mathbb{Z}-$graded manifolds

Differential Geometry 2026-05-13 v2

Abstract

This paper examines Z\mathbb{Z}-graded manifolds as semiformal homogeneity structures, comparing two polynomial filtrations from their local models. In finite dimensions, these are componentwise equivalent, yielding isomorphic graded completions; generally, one induces a finer topology. By the Batchelor-Gawedzki-type theorem (Kotov--Salnikov), every Z\mathbb{Z}-graded manifold over base MM is noncanonically isomorphic to one associated with its canonical Z\mathbb{Z}-graded bundle (Batchelor-Gawedzki bundle). In finite dimensions, this is the formal neighborhood of the zero section with the induced homogeneity structure. Kotov-Salnikov's graded Borel lemma extends weight-kk functions from the formal neighborhood to smooth ones of the same weight. Here, this generalizes to a Borel--Whitney theorem: homogeneity morphisms of formal neighborhoods lift to smooth homogeneity maps between Batchelor-Gawedzki bundles. Categorically, let BZ\mathsf{B}_{\mathbb{Z}} be the category of finite-dimensional Z\mathbb{Z}-graded vector bundles with homogeneity morphisms, and ManZ\mathsf{Man}_{\mathbb{Z}} the category of finite-dimensional Z\mathbb{Z}-graded manifolds. The functor F ⁣:BZManZ\mathsf{F}\colon \mathsf{B}_{\mathbb{Z}} \to \mathsf{Man}_{\mathbb{Z}} sends bundles to formal neighborhoods of their zero sections. The graded Batchelor-Gawedzki and Borel-Whitney theorems imply F\mathsf{F} is full and surjective on objects.

Keywords

Cite

@article{arxiv.2602.02420,
  title  = {The functor between two categories of $\mathbb{Z}-$graded manifolds},
  author = {Martha Valentina Guarin Escudero and Alexei Kotov},
  journal= {arXiv preprint arXiv:2602.02420},
  year   = {2026}
}