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Forms of almost homogeneous varieties over perfect fields
Lucy Moser-Jauslin, Ronan Terpereau
We study the k-forms of almost homogeneous varieties over perfect base fields k. First, we discuss criteria for the existence of k-forms in the homogeneous case. Then, we extend th…
math.AG2020
Isomorphisms between cylinders over Danielewski surfaces
Lucy Moser-Jauslin, Pierre-Marie Poloni
A special Danielewski surface is an affine surface which is the total space of a principal -bundle over an affine line with a multiple origin. Using a fiber product…