Growth Estimates for Orbits of Self Adjoint Groups

Details Growth Estimates for Orbits of Self Adjoint Groups Growth Estimates for Orbits of Self Adjoint Groups

2010-12-13

arxiv.org/abs/1012.2898v1

Mathematics

Differential Geometry

25 pages

Scientific paper

Let G denote a closed, connected, self adjoint, noncompact subgroup of GL(n,R), and let d_{R} denote the canonical right invariant Riemannian metric on G. For v in R^{n} let G_{v} = {g in G : g(v) = v}. We obtain algebraically defined upper and lower bounds for the asymptotic growth rate of g --> log |g(v)| / d_{R}(g,G_{v}), and these bounds are sharp if G_{v} is compact. If the lower bound is positive, then the orbit G(v) is closed in R^{n}. The results apply to representations of noncompact semisimple Lie groups G on finite dimensional real vector spaces.

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