Titlebook: Order,Disorder and Chaos in Quantum Systems; Proceedings of a con Pavel Exner,Hagen Neidhardt Conference proceedings 1990 Birkhäuser Verlag

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Lifshitz-Tails and Non-Lifshitz-Tails for One-Dimensional Random Point Interactionsd edges, in contrast to exponential one at other band edges) of the i.d.s. of random Schrödinger operators is established. Finally, the extension of the proof of (internal) Lifshitz tails to more general kinds of one-dimensional continuous models is discussed.

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Point Interactions with an Internal Structure as Limits of Nonlocal Separable Potentialsan be given explicitly and in the p-representation they have the form.where R.(z)=(p.−z). is the resolvent of the Laplace operator, K(z) is given by the integral kernel.and .for z<0, plays the role of the t-matrix if .∈R; on the other hand, .=∞ corresponds to the free operator −Δ.

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Discrete Spectrum in the Gaps of the Continuous one in the Large-Coupling-Constant Limite special considerations are necessary. For the periodic Schroedinger operator this will be discussed in another paper. Here we restrict ourselves to some applications of the abstract theorem of Section 3.

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0255-0156 October. It is the third meeting in the series started three years ago in which we tried to put together mathematical physicists from the member and non-member countries of JINR with their colleagues from soviet universities and institutes using this international centre as a convenient basis. As in

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ordert. Denn Organisationen der öffentlichen Hand sind angehalten, die Ergebnisse der von ihnen geförderten Projekte zu veröffentlichen (s. DFG-Jahresbericht). Damit soll deren Effi - zienz und Effektivität transparent gemacht werden. Häufig werden die Drittmittelgeber die Zusammenfassung Ihres Absc

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ordert. Denn Organisationen der öffentlichen Hand sind angehalten, die Ergebnisse der von ihnen geförderten Projekte zu veröffentlichen (s. DFG-Jahresbericht). Damit soll deren Effi - zienz und Effektivität transparent gemacht werden. Häufig werden die Drittmittelgeber die Zusammenfassung Ihres Absc

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M. S. Birman,M. Z. Solomyakn volcanoes and their environments.A Reference book highlighThis comprehensive book addresses the pressing need for up-to-date literature on volcanic destinations (active and dormant) and their role in tourism worldwide in chapters and case studies. The book presents a balanced view about the volcan

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