English

Stable Pontryagin-Thom construction for proper maps II

Geometric Topology 2020-08-28 v1

Abstract

In arXiv:1905.07734 we presented a construction that is an analogue of Pontryagin's for proper maps in stable dimensions. This gives a bijection between the cobordism set of framed embedded compact submanifolds in W×RnW\times\mathbb{R}^n for a given manifold WW and a large enough number nn, and the homotopy classes of proper maps from W×RnW\times\mathbb{R}^n to Rk+n\mathbb{R}^{k+n}. In the present paper we generalise this result in a similar way as Thom's construction generalises Pontryagin's. In other words, we present a bijection between the cobordism set of submanifolds embedded in W×RnW\times\mathbb{R}^n with normal bundles induced from a given bundle ξεn\xi\oplus\varepsilon^n, and the homotopy classes of proper maps from W×RnW\times\mathbb{R}^n to a space U(ξεn)U(\xi\oplus\varepsilon^n) that depends on the given bundle. An important difference between Thom's construction and ours is that we also consider cobordisms of non-compact manifolds after indroducing a suitable notion of cobordism relation for these.

Keywords

Cite

@article{arxiv.2008.11781,
  title  = {Stable Pontryagin-Thom construction for proper maps II},
  author = {András Csépai},
  journal= {arXiv preprint arXiv:2008.11781},
  year   = {2020}
}

Comments

19 pages, 4 figures

R2 v1 2026-06-23T18:07:36.439Z