An improved bound for the non-existence of radial solutions of the   Brezis-Nirenberg problem in Hn
  Using a Rellich-Pohozaev argument and Hardy's inequality, we derive an improved bound on the nonlinear eigenvalue for the non existence of radial solutions of a Brezis-Nirenberg problem, with Dirichlet boundary conditions, on a geodesic ball of Hn, for 2<n<4. 
Rafael Benguria and Soledad Benguria
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