Infinite-dimensional Supermanifolds, Lie Supergroups and the Supergroup of Superdiffeomorphisms PDF Download

Author: Jakob Schütt
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Languages : en
Pages : 0

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Book Description
In this thesis, we provide an accessible introduction to the theory of locally convex supermanifolds in the categorical approach with a focus on Lie supergroups and the supergroup of superdiffeomorphisms. In this setting, a supermanifold is a functor from the category of Grassmann algebras to the category of locally convex manifolds that has certain local models, forming something akin to an atlas. We show that the values that these functors take have the structure of a so called multilinear bundle. We use this fact to construct a faithful functor from the category of supermanifolds to the category of manifolds. This functor respects products, commutes with the respective tangent functor and retains the respective Hausdorff property. In this way, supermanifolds can be seen as a particular kind of infinite-dimensional fiber bundles. For Lie supergroups, we use similar techniques to show several useful trivializations and construct a canonical decomposition into purely even and purely odd parts. Using this, we are able to generalize the classical equivalence between Lie supergroups and super Harish-Chandra pairs to the case of arbitrary locally convex Lie supergroups. The supergroup of superdiffeomorphisms of a supermanifold M is a certain set-valued functor SDiff(M) from the category of Grassmann algebras that captures even and odd aspects of supersmooth transformations of M. We show that SDiff(M) has essentially the same decompositions as a Lie supergroup for an arbitrary supermanifold M. If M is a Banach supermanifold with finite-dimensional and sigma-compact base manifold, we are able to turn the supergroup of superdiffeomorphisms with compact support into a Lie supergroup. ; eng