00378nam a2200109Ia 4500008004100000082002000041100002500061245007800086260002700164300002300191440005400214260731b        |||||||| |||| 00| 0 eng d  a515.72bD252.NA  aDavidson, Kenneth R.  aNest algebras; triangular forms for operator algebras on hilbert spaceb/  aEssex:bLongman,c1988  a411p. Index, Bibl.  aPitman research notes in Mathematics series ; 191