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arXiv · 2004.08869

On finite generation of Noetherian algebras over two-dimensional regular local rings

Amartya Kumar Dutta·Neena Gupta·Nobuharu Onoda
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Abstract

Let $R$ be a complete regular local ring with an algebraically closed residue field and let $A$ be a Noetherian $R$-subalgebra of the polynomial ring $R[X]$. It has been shown in \cite{DO2} that if $\dim R=1$, then $A$ is necessarily finitely generated over $R$. In this paper, we give necessary and sufficient conditions for $A$ to be finitely generated over $R$ when $\dim R=2$ and present an example of a Noetherian normal non-finitely generated $R$-subalgebra of $R[X]$ over $R= {\mathbb C}[[u, v]]$.

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Amartya Kumar Dutta, Neena Gupta, Nobuharu Onoda. 2020-04-19. On finite generation of Noetherian algebras over two-dimensional regular local rings. https://arxiv.org/abs/2004.08869

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