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An inequality for elliptic operators of second order with restricted coefficients. (English. Russian original) Zbl 0228.35030
Sov. Math., Dokl. 12, 1009-1012 (1971); translation from Dokl. Akad. Nauk SSSR 199, 17-19 (1971).

MSC:
35R45 Partial differential inequalities and systems of partial differential inequalities
35J99 Elliptic equations and elliptic systems
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