Abstract
This paper does not contain any new result. We give new proofs of the Kempf–Ness Theorem and Hilbert–Mumford criterion for real reductive representations avoiding any algebraic results.
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Biliotti, L., Ghigi, A., Heinzner, P.: Polar orbitopes. Commun. Anal. Geom. 21(3), 579–606 (2013)
Biliotti, L., Ghigi, A., Heinzner, P.: Invariant convex sets in polar representations. Isr. J. Math. 213, 423–441 (2016)
Biliotti, L., Ghigi, A.: Stability of measures on Kähler manifolds. Adv. Math. 317, 1108–1150 (2017)
Biliotti, L., Zedda, M.: Stability with respect to actions of real reductive Lie groups. Ann. Mat. Pura Appl. (4) 196(6), 2185–2211 (2017)
Biliotti, L., Ghigi, A.: Remarks on the abelian convexity theorem. Proc. Am. Math. Soc. 146(12), 5409–5419 (2018)
Biliotti, L., Raffero, A.: Convexity theorems for the gradient map for the gradient map on probability measures. Complex Manifolds 5, 133–145 (2018)
Biliotti, L.: Convexity properties of gradient maps associated to real reductive representations. arXiv preprint arXiv:1905.01915
Birkes, D.: Orbits of linear algebraic groups. Ann. Math. 2(93), 459–475 (1971)
Böhm, C., Lafuente R.A.: Real geometric invariant theory. arXiv preprint arXiv:1701.00643
Borel, A.: Harish-Chandra, Arithmetic subgroups of algebraic groups. Ann. Math. 2(75), 485–535 (1962)
Borel, A.: Linear Algebraic Groups, Graduate Texts in Mathematics, vol. 126, 2nd edn, p. 288. Springer, New York (1991)
Borel, A., Tits, J.: Groupes réductifs. Inst. Hautes Études Sci. Publ. Math. 27, 55–150 (1965)
Borel, A.: Lie groups and linear algebraic groups I. Complex and Real groups. In: Ji, L. (ed.) AMS IP Studies in Advanced Mathematics, vol. 37, pp. 1–49. American Mathematical Society, Providence (2006)
Borel, A., Ji, L.: Compactifications of symmetric and locally symmetric spaces. Mathematics: Theory & Applications. Birkhäuser Boston Inc., Boston, MA, pp. xvi+479 (2006)
Eberlein, P.: Geometry of Nonpositively Curved Manifolds, Chicago Lectures in Mathematics. University of Chicago Press, Chicago (1996)
Eberlein, P., Jablonski, M.: Closed orbit of semi-simple Lie group actions and the real Hilbert–Munford functions. In: New Developments in Lie Theory and Geometry, Contemporary Mathematics, pp. 283–321. American Mathematical Society, Providence (2009)
Harish-Chandra, : Harmonic analysis on real reductive groups I. The theory of the constant term. J. Funct. Anal. 19, 104–204 (1975)
Heinzner, P., Stötzel, H.: Semistable points with respect to real forms. Math. Ann. 338, 1–9 (2007)
Heinzner, P., Schwarz, G.W.: Cartan decomposition of the moment map. Math. Ann. 337(1), 197–232 (2007)
Heinzner, P., Schwarz, G.W., Stötzel, H.: Stratifications with respect to actions of real reductive groups. Compos. Math. 144(1), 163–185 (2008)
Heinzner, P., Stötzel, H.: Critical points of the square of the momentum map. In: Catanese, F., Esnault, H., Huckleberry, A.T., Hulek, K., Peternell, T. (eds.) Global Aspects of Complex Geometry, pp. 211–226. Springer, Berlin (2006)
Heinzner, P., Schützdeller, P.: Convexity properties of gradient maps. Adv. Math. 225(3), 1119–1133 (2010)
Helgason, S.: Differential Geometry, Lie Groups and Symmetric Spaces, Graduate Studies in Mathematics, vol. 34. American Mathematical Society, Providence (2001). (Corrected reprint of the 1978 original)
Kapovich, M., Leeb, B., Millson, J.: Convex functions on symmetric spaces, side lengths of polygons and the stability inequalities for weighted configurations at infinity. J. Differ. Geom. 81(2), 297–354 (2009)
Kempf, G., Ness, L.: The length of vectors in representation spaces. In: Algebraic Geometry (Proceedings of Summer Meeting, University of Copenhagen, Copenhagen, 1978), Volume 732 of Lecture Notes in Mathematics, pp. 233–243. Springer, Berlin (1979)
Kirwan, F.C.: Cohomology of Quotients in Symplectic and Algebraic Geometry, Volume of 31 Mathematical Notes. Princeton University Press, Princeton (1984)
Knapp, A.W.: Lie Groups Beyond an Introduction, Volume 140 of Progress in Mathematics, 2nd edn. Birkhäuser Boston Inc., Boston (2002)
Lauret, J.: On the moment map for the variety of Lie algebras. J. Funct. Anal. 202(2), 392–423 (2003)
Lauret, J.: A canonical compatible metric for geometric structures on nilmanifolds. Ann. Glob. Anal. Geom. 30(2), 107–138 (2006)
Luna, D.: Slices étale. Bull. Soc. Math. France 33, 81–105 (1973)
Luna, D.: Sur certaines opérations différentiables des groupes de Lie. Am. J. Math. 97, 172–181 (1975)
Mostow, G.D.: Some new decomposition theorems for semisimple Lie group. Mem. Am. Math. Soc. 14, 31–54 (1955)
Mostow, G.D.: Self-adjoint groups. Ann. Math. (2) 62, 44–55 (1955)
Mumford, D., Fogarty, J., Kirwan, F.: Geometric Invariant Theory, Volume 34 of Ergebnisse der Mathematik und ihrer Grenzgebiete (2), 3rd edn. Springer, Berlin (1994)
Mundet i Riera, I.: A Hitchin–Kobayashi correspondence for Kähler fibrations. J. Reine Angew. Math. 528, 41–80 (2000)
Mundet i Riera, I.: A Hilbert–Mumford criterion for polystability in Kaehler geometry. Trans. Am. Math. Soc. 362(10), 5169–5187 (2010)
Mundet i Riera, I.: Maximal weights in Kähler geometry: flag manifolds and Tits distance. (With an appendix by A.H.W. Schmitt. Contemporary Mathematics, vol. 522 “Vector bundles and complex geometry”), pp. 113–129. American Mathematical Society, Providence (2010)
Ness, L.: Stratification of the null cone via the moment map. Am. J. Math. 106, 1281–1329 (1984). With an appendix by David Mumford
Richardson, R.W., Slodowoy, P.J.: Minumun vectors for real reductive algebraic groups. J. Lond. Math. Soc. (2) 42, 409–429 (1990)
Schwartz, G.: The topology of algebraic quotients. In: Kraft, H., Petrie, T., Schwartz, G. (eds.) Topological Methods in Algebraic Transformation Groups (New Brunswick, NJ, 1988), Progress in Mathematics, pp. 131–151. Birkhäuser, Boston (1989)
Sjamaar, R.: Holomorphic slices, symplectic reduction and multiplicity representations. Ann. Math. (2) 141, 87–129 (1995)
Teleman, A.: Symplectic stability, analytic stability in non-algebraic complex geometry. Int. J. Math. 15(2), 183–209 (2004)
Wallach, N.R.: Real Reductive Groups I, Pure and Applied Mathematics, 132. Academic Press Inc., Boston (1988)
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The author was partially supported by PRIN 2015 “Varietà reali e complesse: geometria, topologia e analisi armonica” and GNSAGA INdAM.
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Biliotti, L. The Kempf–Ness Theorem and invariant theory for real reductive representations. São Paulo J. Math. Sci. 15, 54–74 (2021). https://doi.org/10.1007/s40863-019-00151-6
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DOI: https://doi.org/10.1007/s40863-019-00151-6