Embedding a non-embeddable stable plane (Q1206514)

Let \(S_ R\) be the two-dimensional stable plane introduced by V. Strambach admitting \(\Sigma=SL_ 2R\) as a group of automorphism which does not admit \(\Sigma\)-invariant embedding into a two-dimensional projective plane. In the paper under review the author shows that this plane \(S_ R\) admits \(\Sigma\)-invariant embedding into (4-dimensional) analogue \(S_ C\) introduced by P. Löwen admitting \(\Delta=Sl_ 2C\) as a group of automorphism (we suppose \(Sl_ 2R\subset Sl_ 2C)\). Moreover all these embedding are described here.