Access the full text.
Sign up today, get DeepDyve free for 14 days.
For any complex simple Lie algebra g, the operator Ω with (1.2) is diagonalizable. Its systems Spec[g] of eigenvalues and Mult[g] of the corresponding multiplicities are Spec
J. Adams, Z. Mahmud, 三村 護 (1996)
Lectures on Exceptional Lie Groups
G. Veciana, Edward Powers, M. Akella, Robert Heath, Liang Dong, Alberto Arredondo, Hosung Choo, K. Dandekar, Zhihui Deng, Lars Hansen, Shain-Shun Jeng, JoonHyuk Kang, Adnan Kavak, Sang-Youb Kim, Hang Li, Junfei Li, Garret Okamoto, Murat Torlak, Roberto Vargas, Weidong Yang (1969)
Private communication
A. Onishchik (2003)
Lectures on Real Semisimple Lie Algebras and Their Representations
Kurt Meyberg (1984)
Spurformeln in einfachen lie-algebrenAbhandlungen aus dem Mathematischen Seminar der Universität Hamburg, 54
E. Calabi, E. Vesentini (1960)
On Compact, Locally Symmetric Kahler ManifoldsAnnals of Mathematics, 71
M. Hausner, J. Schwartz (1968)
Lie Groups; Lie Algebras
Andrzej Derdzinski (2012)
Indefinite Einstein Metrics on Simple Lie Groups
J. Bourguignon, H. Karcher (1978)
Curvature operators: pinching estimates and geometric examplesAnnales Scientifiques De L Ecole Normale Superieure, 11
(1987)
Einstein Manifolds
The Killing form β of a real (or complex) semisimple Lie group G is a left-invariant pseudo-Riemannian (or, respectively, holomorphic) Einstein metric. Let Ω denote the multiple of its curvature operator, acting on symmetric 2-tensors, with the factor chosen so that Ωβ=2β. We observe that the result of Meyberg (in Abh. Math. Semin. Univ. Hamb. 54:177–189, 1984), describing the spectrum of Ω in complex simple Lie groups, easily leads to an analogous description for real simple Lie groups. In particular, 1 is not an eigenvalue of Ω in any real or complex simple Lie group G except those locally isomorphic to SL( $n,\mathbb {C}$ ) or one of its real forms. As shown in our recent paper (Derdzinski and Gal in Indiana Univ. Math. J., to appear), the last conclusion implies that, on such simple Lie groups G, nonzero multiples of the Killing form β are isolated among left-invariant Einstein metrics. Meyberg’s theorem also allows us to understand the kernel of Λ, which is another natural operator. This in turn leads to a proof of a known, yet unpublished, fact: namely, that a semisimple real or complex Lie algebra with no simple ideals of dimension 3 is essentially determined by its Cartan three-form.
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg – Springer Journals
Published: Oct 31, 2013
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.