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Publikováno v:
Mathematische Nachrichten. Jun2021, Vol. 294 Issue 6, p1134-1139. 6p.
Publikováno v:
Mathematische Nachrichten, 2021, Vol.294(6), pp.1134-1139 [Peer Reviewed Journal]
In this article we prove upper bounds for the Laplace eigenvalues $\lambda_k$ below the essential spectrum for strictly negatively curved Cartan-Hadamard manifolds. Our bound is given in terms of $k^2$ and specific geometric data of the manifold. Thi