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Second order equations with nonnegative characteristic form /

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Bibliographic Details
Main Author: Oleĭnik, O. A.
Other Authors: Radkevich, E. V. (Evgeniĭ Vladimirovich)
Format: Book
Language:English
Russian
Published: Providence, R.I. : American Mathematical Society, [1973]
Subjects:
Differential equations, Partial.
Boundary value problems.
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