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@article{faucris.116307224,
abstract = {Let G be a connected, reductive group defined over an alebraically closed field of characteristic zero. We assign to any G-variety X a finite cristallographic reflection group W{\_}X by means of the moment map on the cotangent bundle. This generalizes the "little Weyl group" of a symmetric space. The Weyl group *W*_{X } is related to the equivariant compactification theory of *X*. We determine the closure of the image of the moment map and the generic isotropy group of the action of G on the cotangent bundle. As a byproduct we determine the ideal of elements of U(g) which act trivially on X as a differential operator.},
author = {Knop, Friedrich},
doi = {10.1007/BF01234409},
faupublication = {no},
journal = {Inventiones Mathematicae},
month = {Jan},
pages = {1-23},
peerreviewed = {Yes},
title = {{Weylgruppe} und {Momentabbildung}},
volume = {99},
year = {1990}
}