Saak, E. M. On the approximation of solutions to elliptic equations together with derivatives up to the boundary. (English. Russian original) Zbl 0287.35016 Sov. Math., Dokl. 14, 74-77 (1973); translation from Dokl. Akad. Nauk SSSR 208, 277-279 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 35E99 Partial differential equations and systems of partial differential equations with constant coefficients 35J40 Boundary value problems for higher-order elliptic equations 35B35 Stability in context of PDEs PDFBibTeX XMLCite \textit{E. M. Saak}, Sov. Math., Dokl. 14, 74--77 (1973; Zbl 0287.35016); translation from Dokl. Akad. Nauk SSSR 208, 277--279 (1973)