Prima lezione: 4/3/2015

In our first lecture we recall previous notions about rings and ideals: definitions, eucliden rings, PID, UFD, irreducible and prime elements, ideals, prime and maximal ideals, nilpotent elements, I II and III omomorphism theorem for ideals, ideals of Z[i]/(2+i), the nipotent elements are the intersection of all prime ideals, definition of the Jacobson radical.