00309nam a2200121Ia 4500082002000000100002100020245002600041260004800067300001900115490004300134500000500177700000500182  a515.73bP655.OL  aPinkus, Allan M.  aOn L1-approximationb  aCambridgebCambridge University Pressc1989  ax, 239p. Index  aCambridge tracts in Mathematicsv v.93  a  a