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math.AG2020
Some polynomial maps with Jacobian rank two or three
Dan Yan
In the paper, we first classify all polynomial maps of the form in the case that is nilpotent and . After that, we generalize the s…
math.AG2020
On Shamsuddin derivations and the isotropy groups
Dan Yan
In the paper, we give an affirmative answer to the conjecture in \cite{13}. We prove that a Shamsuddin derivation is simple if and only if $\operatorname{Aut}(K[x,y_1,\allowbre…