We show that the real Cremona group of the plane is a non-trivial amalgam of
two groups amalgamated along their intersection and give an alternative proof
of its abelianisation

Zimmermann, Susanna

English

arXiv

We show that the real Cremona group of the plane is a non-trivial amalgam of two groups amalgamated along their intersection and givean alternative proof of its abelianisation

The real plane Cremona group is a non-trivial amalgam

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