Geodesic
Spectral Shift Function of the Schr\"odinger Operator in the Large Coupling Constant Limit
Funkcionalʹnyj analiz i ego priloženiâ, Tome 36 (2002) no. 3, pp. 93-95.

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The spectral shift function of a Schrödinger operator with a perturbation of definite sign is considered. The asymptotics of the spectral shift function for large coupling constant is studied, and results concerning positive and negative perturbations are compared. A more general case of unperturbed operator given by a function of the Laplacian is discussed. This case explains the dependence of the asymptotics of the spectral shift function on the perturbation potential on the one hand and on the order of the unperturbed operator on the other hand.
Keywords: spectral shift function, Schrodinger operator, scattering theory. 
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A. B. Pushnitskii; M. V. Ruzhansky. Spectral Shift Function of the Schr\"odinger Operator in the Large Coupling Constant Limit. Funkcionalʹnyj analiz i ego priloženiâ, Tome 36 (2002) no. 3, pp. 93-95. http://geodesic.mathdoc.fr/item/FAA_2002_36_3_a15/

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