I can only find the first edition on Amazon, but there's apparently a third edition? http://www.matem.unam.mx/ernesto/EDO/Ar-EDO.pdf http://www.matem.unam.mx/er

I can only find the first edition on Amazon, but there's apparently a third edition? http://www.matem.unam.mx/ernesto/EDO/Ar-EDO.pdf http://www.matem.unam.mx/ernesto/EDO/Ar-EDO.pdf https://www.amazon.com/Ordinary-Differential-Equations-MIT-Press/dp/0262510189/ref=sr_1_sc_1?s=books&ie=UTF8&qid=1536220865&sr=1-1-spell&keywords=Ordinary+Differential+Equations+arnol https://www.amazon.com/Ordinary-Differential-Equations-MIT-P...