01000nam1-2200361l--450-99000023073020331620091112095626.00023073USA010023073(ALEPH)000023073USA01002307320019901210819..----y0itay0103----baengUSPure and applied mathematicsa series of texts and monographsEdited by R. Courant, L. Bers and J. J. StokerNew YorkInterscience Publishers19...v.24 cmMatematica510COURANT,R.BERS,L.STOKER,J. J.ITsalbcISBD990000230730203316510 PAMS/CBS510BKSCI1990121020001110USA01171420020403USA011631PATRY9020040406USA011617RSIAV69020091112USA010956UNISA