Geodesic
Generalized Spectral Theory and Second Order Ordinary Differential Operators
Canadian journal of mathematics, Tome 25 (1973) no. 1, pp. 178-193

Voir la notice de l'article provenant de la source Cambridge University Press

This paper continues the study, begun in [7], of the spectral theory of non-self-ad joint second order ordinary differential operators on a half-line. The case of a ‘Very small” potential was studied in [4; 5; 6]. The case considered in [7], and in the present paper, is that where the potential is not so small. 
Sussmann, Héctor J. Generalized Spectral Theory and Second Order Ordinary Differential Operators. Canadian journal of mathematics, Tome 25 (1973) no. 1, pp. 178-193. doi: 10.4153/CJM-1973-016-6
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