Abstract
LetB be a Borel-subgroup ofSL(2,C). In this note we describe the closures of arbitrarySL(2,C)-andB-orbits in the projective space of regularSL(2,C)-modules by means of simple combinatorial data. We give a criterion to detect whether the number of orbits in an orbit-closure is finite or not.
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Literature
Aluffi, P., Faber, C.: Linear orbits of d-tuples of points inP 1. J. reine angew. Math. 445, 205–220(1993)
Bartels, D.: Quasihomogene affine Varietäten fürSL(2,C). Lecture Notes in Math. 1146, 1–105(1985)
Jauslin-Moser, L.: Smooth Embeddings ofSL(2) andPSL(2). Journal of Algebra 132, 384–405(1990)
Kraft, H.: Geometrische Methoden in der Invariantentheorie. Vieweg-Verlag, Braunschweig 1984
Luna, D., Vust, Th.: Plongements d’espaces homogènes. Comment. Math. Helv. 58, 186–245(1983)
Nakano, T.: On equivariant completions of 3-dimensional homogeneous spaces ofSL(2,C). Japanese J. Math. 15, 221–273(1989)
Popov, V.: Quasihomogeneou Affine Algebraic Varieties of the GroupSL(2,C). Math. USSR Izvestija 7, 793–831 (1973)
Popov, V.: Structure of the Closure of Orbits in Spaces of Finite-Dimensional LinearSL(2,C)-Representations. Math. Notes 16, 1159–1162(1974)
Serre, J.-P.: Espaces fibrés algèbriques. In: Anneaux de Chow et Applications. Séminaire Chevalley. Paris: E.N.S. (1958)
Steinberg, R.: Conjugacy Classes in Algebraic Groups. Lecture Notes Math. 366, Springer Verlag, Berlin 1974
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Pauer, F. Closures of SL(2)-orbits in projective spaces. Manuscripta Math 87, 295–309 (1995). https://doi.org/10.1007/BF02570476
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DOI: https://doi.org/10.1007/BF02570476