Abstract
In this paper, we look at the notion of cohomological triviality of fibrations of homogeneous spaces of affine algebraic groups defined over \({\mathbb {C}}\) and use topological methods, primarily the theory of covering spaces. This is made possible because of the structure theory of affine algebraic groups. Further, we generalize our results for arbitrary connected algebraic groups and their homogeneous spaces. As an application of our methods, we give a structure result for quasi- reductive algebraic groups (i.e., algebraic groups whose unipotent radical is trivial), up to isogeny.
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References
Borel A, Linear Algebraic Groups, Second Enlarged Edition, Grad. Texts in Math. 126 (1991) (New York: Springer-Verlag)
Borel A, On affine algebraic homogeneous spaces, Arch. Math. (Basel) 45(1) (1985) 74–78
Brion M, Some structure theorems for algebraic groups, Proc. Sympos. Pure Math., 94, Amer. Math. Soc., Providence, RI (2017) pp. 53–125
Brion M, Commutative algebraic groups up to isogeny, Doc. Math. 22 (2017) 679–725
Conrad B, A Modern proof of Chevalley’s theorem on algebraic groups, J. Ramanujan Math. Soc. 17(1) (2002) 1–18
Conrad B, Units on Product Varieties, (http://math.stanford.edu/~conrad/papers/unitthm.pdf)
Damon J, Topology of exceptional orbit hypersurfaces prehomogeneous spaces, J. Topol. 9(3) (2016) 797–825
Humphreys J E, Linear Algebraic groups, Grad. Texts in Math. 21 (1975) (New York: Springer- Verlag)
Husemoller D, Fibre Bundles, Grad. Texts in Math. 20 (1994) (New York: Springer-Verlag)
Kambayashi T, Miyanishi M and Takeuchi M, Unipotent Algebraic Groups, Lecture Notes in Math. (1974) (Berlin, Heidelberg: Springer-Verlag)
Kimura T, Introduction to prehomogeneous vector spaces, Translations of Mathematical Monographs, vol. 215, American Mathematical Society, Providence, RI (2003), translated from the 1998 Japanese original by Makoto Nagura and Tsuyoshi Niitani and revised by the author
McCleary J, A User’s Guide to Spectral Sequences, 2nd edition (2001) Cambridge Studies in Advanced Mathematics
Massey W, A Basic Course in Algebraic Topology, Grad. Texts in Math. 127 (1991) (New York: Springer-Verlag)
Milne J S, Algebraic Groups: The Theory of Group Schemes of Finite Type Over a Field (2017) Cambridge Studies in Advanced Mathematics
Milnor J W, Singular Points of Complex Hypersurfaces, Annals of Mathematics Studies, No. 61 (1968) (Princeton, NJ: Princeton University Press; Tokyo: University of Tokyo Press)
Mimura M and Toda H, Topology of Lie groups I and II, translations of Mathematical Monographs, 91, American Mathematical Society, Providence RI (1991)
Mumford D, Abelian Varieties, Corrected reprint of 2nd edition (2016) (Hindustan Book Agency)
Richardson R W, Affine coset space of reductive algebraic groups, Bull. London Math. Soc. 9(1) (1977) 38–41
Rosenlicht M, Toroidal algebraic groups, Proc. Amer. Math. Soc. 12 (1961) 984–988
Rosenlicht M, Some basic theorems on algebraic groups, Amer. J. Math. 78 (1956) 401–443
Sato M and Kimura T, A classification of irreducible prehomogeneous vector spaces and their relative invariants, Nagoya Math. J. 65(1) (1977) 1–155
Schmitt A H W, Geometric invariant theory and decorated principal bundles, Zurich Lectures in Advanced Mathematics (2008) (European Mathematical Society (EMS))
Spanier E H, Algebraic topology (1966) (New York: McGraw-Hill Publishers)
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Communicating Editor: Parameswaran Sankaran
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Parameswaran, A.J., Shastri, K.A. Character on a homogeneous space. Proc Math Sci 131, 12 (2021). https://doi.org/10.1007/s12044-021-00608-9
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DOI: https://doi.org/10.1007/s12044-021-00608-9