00821nam0-22003011i-450-990000895470403321200010100-471-03650-1000089547FED01000089547(Aleph)000089547FED0100008954720001010d--------km-y0itay50------baitay-------001yyApproximation of Elliptic Boundary-Value ProblemsNew YorkJohn Wiley1972p.360ill.cm 20MatematicaAubin,Jean-Pierre54013ITUNINARICAUNIMARCBK99000089547040332103 M.0,1762729IINTCIINTCApproximation of elliptic boundary-value problems118546UNINAING01