THE REAL PLANE CREMONA GROUP IS A NON-TRIVIAL AMALGAM

Susanna Zimmermann (1)

1 IMT - Institut de Mathématiques de Toulouse UMR5219

We show that the real Cremona group of the plane is a non-trivial amalgam of two groups amalgamated along their intersection.

Domaines: Géométrie algébrique [math.AG]; Théorie des groupes [math.GR]

Susanna Zimmermann. THE REAL PLANE CREMONA GROUP IS A NON-TRIVIAL AMALGAM. 2018. ⟨hal-01719064v1⟩