Mathematics – Differential Geometry
Scientific paper
1994-06-30
Proc. AMS 124,5 (1996), 1633-1642
Mathematics
Differential Geometry
10 pages, ESI Preprint 87, AmSTeX
Scientific paper
A section of a Riemannian $G$-manifold $M$ is a closed submanifold $\Sigma$ which meets each orbit orthogonally. It is shown that the algebra of $G$-invariant differential forms on $M$ which are horizontal in the sense that they kill every vector which is tangent to some orbit, is isomorphic to the algebra of those differential forms on $\Sigma$ which are invariant with respect to the generalized Weyl group of this orbit, under some condition.
Michor Peter W.
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