Tangent functor on microformal morphisms, and non-linear pullbacks for forms and cohomology
Abstract
We show how the tangent functor extends from ordinary smooth maps to "microformal morphisms" (also called "thick morphisms") of supermanifolds. Microformal morphisms generalize ordinary maps and correspond to formal canonical relations between the cotangent bundles specified by generating functions depending on position variables on the source manifold and momentum variables on the target manifold (as formal power expansions), regarded as part of the structure. Microformal morphisms act on functions by non-linear (in general) pullbacks. We obtain here non-linear pullbacks of (pseudo)differential forms and show that they respect the de Rham differentials as "non-linear chain maps" that can induce non-linear transformations of cohomology.
Cite
@article{arxiv.1710.04335,
title = {Tangent functor on microformal morphisms, and non-linear pullbacks for forms and cohomology},
author = {Theodore Th. Voronov},
journal= {arXiv preprint arXiv:1710.04335},
year = {2024}
}
Comments
LaTeX, 29 pages. This final version has been substantially reworked and expanded. Journal of Geometry and Physics (2024)