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Approximation of the solution of some boundary-value and mixed problems. (English. Russian original) Zbl 0448.35035
Sov. Math., Dokl. 21, 117-121 (1980); translation from Dokl. Akad. Nauk SSSR 250, 535-539 (1980).

MSC:
35J25 Boundary value problems for second-order elliptic equations
35G15 Boundary value problems for linear higher-order PDEs
35A35 Theoretical approximation in context of PDEs
35K20 Initial-boundary value problems for second-order parabolic equations
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