00744nam a2200229 a 450000500170000002000150001708200150003210000210004724500700006826000480013830000250018649000560021169000230026769000230029069000250031369000330033869000210037196400160039299700190040899900190042795200680044620251203110904.0  a0821830201  a510.8bNIK  aNikol'skii, K.N.  aSelected problems of weighted approximation and spectral analysis  aIslandbAmerican Mathematical Societyc1976  aiv,276p.c26 cm.bPB  aProceedings of the steklov institute of mathematics  aAnalytic functions  aHarmonic functions  aApproximation theory  aSpectral theory(mathematics)  aLinear operators  bcdefg_  a131107 LIBSC C  c106340d106340  00104070aPUbPUd2008-05-13g27.75l0o510.8 NIKp131107yBK