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math.AG2026
Semicontinuity for families of power series II
Gert-Martin Greuel, Gerhard Pfister
The present article is a generalization of our paper \cite{GP21}, together with new applications. The original problem came up in connection with the classification of singularitie…
math.AG2026
Singularities in any Characteristic
Gert-Martin Greuel
We give an overview of the fundamental definitions and results concerning hypersurface singularities, defined by convergent power series over an arbitrary real valued field. This a…