Ramm, Alexander G.2013-06-182013-06-182013-01-28http://hdl.handle.net/2097/15916en-USThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).Elliptic operatorsWave equationLimiting amplitude principleLimiting absorption principleSpectral properties of Schrödinger-type operators and large-time behavior of the solutions to the corresponding wave equationArticle (publisher version)