Paper 1, Section II, G

Groups, Rings and Modules
Part IB, 2021

Show that a ring RR is Noetherian if and only if every ideal of RR is finitely generated. Show that if ϕ:RS\phi: R \rightarrow S is a surjective ring homomorphism and RR is Noetherian, then SS is Noetherian.

State and prove Hilbert's Basis Theorem.

Let αC\alpha \in \mathbb{C}. Is Z[α]\mathbb{Z}[\alpha] Noetherian? Justify your answer.

Give, with proof, an example of a Unique Factorization Domain that is not Noetherian.

Let RR be the ring of continuous functions RR\mathbb{R} \rightarrow \mathbb{R}. Is RR Noetherian? Justify your answer.