B. M. Levitan, “On expansions according to eigenfunctions of the equation <nobr>$\Delta u+\{\lambda-q(x_1,x_2,\dots,x_n)\}=0$</nobr>”, Izv. Akad. Nauk SSSR Ser. Mat., 1956, Volume 20, Issue 4,Pages <nobr>437

JOURNALS // Izvestiya Rossiiskoi Akademii Nauk. Seriya Matematicheskaya // Archive

Izv. Akad. Nauk SSSR Ser. Mat., 1956 Volume 20, Issue 4, Pages 437–468 (Mi im3767)

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On expansions according to eigenfunctions of the equation $\Delta u+\{\lambda-q(x_1,x_2,\dots,x_n)\}=0$

B. M. Levitan

Received: 28.12.1954

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