00353nam a2200133 a 450000500170000002000150001708200170003210000240004924500370007326000290011030000250013949000330016470000220019720251203110444.0  a038794933X  a515.076bSOU  ade Souza, Paulo Ney  aBerkeley Problems in Mathematics  aBerkeleybSpringerc1998  axiv,443p.c22 cm. PB  aProblem Books in Mathematics  aSilva, Jorge-Nuno