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Über schwache und starke Erweiterungen von Differentialoperationen. (Russian) Zbl 0407.47026

MSC:
47F05 General theory of partial differential operators (should also be assigned at least one other classification number in Section 47-XX)
47E05 General theory of ordinary differential operators (should also be assigned at least one other classification number in Section 47-XX)
35G15 Boundary value problems for linear higher-order PDEs
34B05 Linear boundary value problems for ordinary differential equations
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