00394nam a2200133 a 450000500170000002000150001708200160003210000170004824500730006525000080013826000340014630000250018049000550020520251203110444.0  a3540780386  a515.35bARN  aArnold, V.I.  aGeometrical Methods in the Theory of Ordinary Differential equations  a2nd  aLondonbSpringer-Verlagc1988  axii,351p.c22 cm. PB  aGrundlehren der mathematischen Wissenschaftend250