* injective modules over a Lie groupoid
@ 2008-06-10 20:20 Johannes Huebschmann
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From: Johannes Huebschmann @ 2008-06-10 20:20 UTC (permalink / raw)
To: categories
Dear All
For a Lie group G and a vector space V,
C^{\infty}(G,V) is a differentiably injective G-module
(Hochschild-Mostow).
Is there an analoguous construction
for a Lie groupoid or, in the algebraic setting,
cogroupoid object in the category of commutative algebras?
Let G be a Lie groupoid, with object manifold G_o,
source and target maps being supposed surjective submersions.
A G-module is a vector bundle
V \to G_o
on G_o with a G-structure
(pairing G x_G_o V to V over G_o satisfying the obvious compatiblity
conditions).
If we start with a vector bundle V to G_o on G_o,
what corresponds to the construction
C^{\infty}(G,V)
for the special case where G is an ordinary Lie group?
More generally, G being a Lie groupoid,
does the category of G-modules have enough injectives?
Where in the literature can I find answers to these questions
if any?
Many thanks in advance
Regards
Johannes
HUEBSCHMANN Johannes
Professeur de Mathematiques
USTL, UFR de Mathematiques
UMR 8524 Laboratoire Paul Painleve
F-59 655 Villeneuve d'Ascq Cedex France
http://math.univ-lille1.fr/~huebschm
TEL. (33) 3 20 43 41 97
(33) 3 20 43 42 33 (secretariat)
(33) 3 20 43 48 50 (secretariat)
Fax (33) 3 20 43 43 02
e-mail Johannes.Huebschmann@math.univ-lille1.fr
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2008-06-10 20:20 injective modules over a Lie groupoid Johannes Huebschmann
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