Abstract
A Riemannian Einstein solvmanifold (possibly, any noncompact homogeneous Einstein space) is almost completely determined by the nilradical of its Lie algebra. A nilpotent Lie algebra which can serve as the nilradical of an Einstein metric solvable Lie algebra is called an Einstein nilradical. We give a classification of two-step nilpotent Einstein nilradicals with two-dimensional center. Informally, the defining matrix pencil must have no nilpotent blocks in the canonical form and no elementary divisors of a very high multiplicity. We also show that the dual to a two-step Einstein nilradical is not in general an Einstein nilradical.
Similar content being viewed by others
References
Alekseevskii D.V.: Classification of quaternionic spaces with transitive solvable group of motions. Math. USSR. Izv. 9, 297–339 (1975)
Alekseevskii D.V.: Homogeneous Riemannian spaces of negative curvature. Math. USSR. Sb. 25, 87–109 (1975)
Alekseevskii D.V., Kimel’fel’d B.N.: Structure of homogeneous Riemannian spaces with zero Ricci curvature. Funct. Anal. Appl. 9, 97–102 (1975)
Belitskii G., Lipyanski R., Sergeichuk V.: Problems of classifying associative or Lie algebras and triples of symmetric or skew-symmetric matrices are wild. Linear Algebra Appl. 407, 249–262 (2005)
Besse A.: Einstein Manifolds. Springer, Berlin (1987)
Dotti Miatello I.: Ricci curvature of left-invariant metrics on solvable unimodular Lie groups. Math. Z. 180, 257–263 (1982)
Eberlein P.: Geometry of 2-step nilpotent Lie groups. Modern Dynamical Systems, pp. 67–101. Cambridge University Press, Cambridge (2004)
Eberlein, P.: Riemannian 2-step nilmanifolds with prescribed Ricci tensor. Geometric and Probabilistic Structures in Dynamics. Contemporary Mathematics, vol. 469, pp. 167–195. American Mathematical Soceity, Providence (2008)
Galitski L., Timashev D.: On classification of metabelian Lie algebras. J. Lie Theory 9, 125–156 (1999)
Gantmacher F.R.: The Theory of Matrices. vol. 1, 2. Chelsea Publishing Co., New York (1959)
Gauger M.: On the classification of metabelian Lie algebras. Trans. Am. Math. Soc. 179, 293–329 (1973)
Gordon C., Kerr M.: New homogeneous Einstein metrics of negative Ricci curvature. Ann. Global Anal. Geom. 19, 75–101 (2001)
Heber J.: Noncompact homogeneous Einstein spaces. Invent. Math. 133, 279–352 (1998)
Jablonski, M.: Real Geometric Invariant Theory and Ricci soliton metrics on two-step nilmanifolds. Thesis (2008)
Lancaster P., Rodman L.: Canonical forms for symmetric/skew-symmetric real matrix pairs under strict equivalence and congruence. Linear Algebra Appl. 406, 1–76 (2005)
Lauret J.: Ricci soliton homogeneous nilmanifolds. Math. Ann. 319, 715–733 (2001)
Lauret J.: Finding Einstein solvmanifolds by a variational method. Math. Z. 241, 83–99 (2002)
Lauret J.: Einstein solvmanifolds are standard. Ann. Math. 172(2), 1859–1877 (2010)
Lauret J.: Einstein solvmanifolds and nilsolitons. New developments in Lie theory and geometry Contemporary Mathematics, vol. 491, pp. 1–35. American Mathematical Soceity, Providence (2009)
Lauret J., Will C.: Einstein solvmanifolds: existence and non-existence questions. Math. Ann. 350, 199–225 (2011)
Nikolayevsky, Y.: Nilradicals of Einstein solvmanifolds. arXiv: math.DG/0612117 (Preprint, 2006)
Nikolayevsky Y.: Einstein solmanifolds with free nilradical. Ann. Global Anal. Geom. 33, 71–87 (2008)
Nikolayevsky Y.: Einstein solvmanifolds with a simple Einstein derivation. Geom. Dedicata 135, 87–102 (2008)
Nikolayevsky Y.: Einstein solvmanifolds and the pre-Einstein derivation. Trans. Am. Math. Soc. 363, 3935–3958 (2011)
Payne T.: The existence of soliton metrics for nilpotent Lie groups. Geom. Dedicata 145, 71–88 (2010)
Tamaru H.: Parabolic subgroups of semisimple Lie groups and Einstein solvmanifolds. Math. Ann. 351, 51–66 (2011)
Will C.: Rank-one Einstein solvmanifolds of dimension 7. Differ. Geom. Appl. 19, 307–318 (2003)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Nikolayevsky, Y. Einstein solvmanifolds attached to two-step nilradicals. Math. Z. 272, 675–695 (2012). https://doi.org/10.1007/s00209-011-0954-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00209-011-0954-z