The Schwarz–Voronov Embedding of ${\mathbb Z}_{2}^{n}$-Manifolds

Andrew James Bruce ; Eduardo Ibarguengoytia ; Norbert Poncin

Symmetry, integrability and geometry: methods and applications, Tome 16 (2020)

Résumé

Informally, ${\mathbb Z}_2^n$-manifolds are ‘manifolds’ with ${\mathbb Z}_2^n$-graded coordinates and a sign rule determined by the standard scalar product of their ${\mathbb Z}_2^n$-degrees. Such manifolds can be understood in a sheaf-theoretic framework, as supermanifolds can, but with significant differences, in particular in integration theory. In this paper, we reformulate the notion of a ${\mathbb Z}_2^n$-manifold within a categorical framework via the functor of points. We show that it is sufficient to consider ${\mathbb Z}_2^n$-points, i.e., trivial ${\mathbb Z}_2^n$-manifolds for which the reduced manifold is just a single point, as ‘probes’ when employing the functor of points. This allows us to construct a fully faithful restricted Yoneda embedding of the category of ${\mathbb Z}_2^n$-manifolds into a subcategory of contravariant functors from the category of ${\mathbb Z}_2^n$-points to a category of Fréchet manifolds over algebras. We refer to this embedding as the Schwarz–Voronov embedding. We further prove that the category of ${\mathbb Z}_2^n$-manifolds is equivalent to the full subcategory of locally trivial functors in the preceding subcategory.

Détail

Keywords: supergeometry, superalgebra, ringed spaces, higher grading, functor of points.

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