Hubert Flenner

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math.AC2005

Power series rings and projectivity

R. -O. Buchweitz, H. Flenner

We show that a formal power series ring $A [[X]]$ over a noetherian ring $A$ is not a projective module unless $A$ is artinian. However, if $(A, m)$ is local, then $A[[X]…

math.AC2005

Codimension and connectedness of degeneracy loci over local rings

Hubert Flenner, Bernd Ulrich

We deduce results on the dimension and connectedness of degeneracy loci of maps of finite modules $f : M \to N$ over a local noetherian ring $(A, m)$ . We show for instance…