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3 votes
1 answer
776 views

On the coherence of a Néron-ring

Let $A:= \underset{\lambda \in \Lambda}{\varinjlim} \,A_{\lambda}$ be an inductive limit of geometric regular local ring $(A_{\lambda}, {\frak m}_{\lambda})$, whose transition map $\phi_{\mu\lambda} \...
Pierre's user avatar
  • 563
1 vote
2 answers
508 views

Base change of a finite morphism

Let $X$, $Y$, $Z$ be integral schemes of finite type over a field $K$ (i.e., locally affine opens are finitely-generated algebras over $K$). Suppose we have the following condition$\colon$ $f \colon ...
Pierre's user avatar
  • 563
1 vote
0 answers
179 views

Spivakovski-Popescu-Neron desingularisation

For $A \colon= {\Bbb F}_p[[X_1,...,X_d]]$, by generalising Popescu-Neron's method, Spivakovski proved that $A$ is written by smooth sub-algebras. That is, $A \cong \underset{\lambda \in \Lambda}{\...
Pierre MATSUMI's user avatar