On conditions for the multiple expandability of functions in the root elements of a pencil of ordinary differential operators |
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| Authors: | A. I. Vagabov |
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| Affiliation: | 1. Vladikavkaz Scientific Center of the Russian Academy of Sciences, Dagestan State University, Makhachkala, Russia
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| Abstract: | We consider a general pencil of linear ordinary differential operators under the weakest possible restrictions on the smoothness of the coefficients. A detailed analysis of the notion of regular boundary conditions is presented. An n-fold expansion formula is obtained. |
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