Immanuel Stampfli

Automorphisms of the plane preserving a curve

We study the group of automorphisms of the affine plane preserv- ing some given curve, over any field. The group is proven to be algebraic, except in the case where the curve is a bunch of parallel lines. Moreover, a classification of the groups of positive dimension occuring is also given in the case where the curve is geometrically irreducible and the field is perfect.

On Automorphisms of the Affine Cremona Group@@@Sur les automorphismes du groupe de Cremona affine

We show that every automorphism of the group

On the topologies on ind-varieties and related irreducibility questions

\mathcal{G}_n:= \textrm{Aut}(\mathbb{A}^n)

A note on automorphisms of the affine Cremona group

of polynomial automorphisms of complex affine

ALGEBRAIC EMBEDDINGS OF ℂ INTO SL n (ℂ)

n

Automorphisms of ℂ3 Commuting with a ℂ+-Action

-space

Uniqueness of Embeddings of the Affine Line into Algebraic Groups

\mathbb{A}^n=\mathbb{C}^n

Holomorphically Equivalent Algebraic Embeddings

is inner up to field automorphisms when restricted to the subgroup

Automorphisms of the affine Cremona group

T \mathcal{G}_n

On maximal subalgebras

of tame automorphisms. This generalizes a result of \textsc{Julie Deserti} who proved this in dimension