Geodesic
On modality and complexity of affine embeddings
Sbornik. Mathematics, Tome 192 (2001) no. 8, pp. 1133-1138

Voir la notice de l'article provenant de la source Math-Net.Ru

Let $G$ be a reductive algebraic group and let $H$ be a reductive subgroup of $G$. The modality of a $G$-variety $X$ is the largest number of the parameters in a continuous family of $G$-orbits in $X$. A precise formula for the maximum value of the modality over all affine embeddings of the homogeneous space $G/H$ is obtained. 
@article{SM_2001_192_8_a1,
     author = {I. V. Arzhantsev},
     title = {On modality and complexity of affine embeddings},
     journal = {Sbornik. Mathematics},
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     publisher = {mathdoc},
     volume = {192},
     number = {8},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2001_192_8_a1/}
}
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I. V. Arzhantsev. On modality and complexity of affine embeddings. Sbornik. Mathematics, Tome 192 (2001) no. 8, pp. 1133-1138. http://geodesic.mathdoc.fr/item/SM_2001_192_8_a1/