THE REAL PLANE CREMONA GROUP IS A NON-TRIVIAL AMALGAM

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-01719064
Contributor : Susanna Zimmermann <>
Submitted on : Wednesday, March 27, 2019 - 10:01:22 AM
Last modification on : Friday, May 10, 2019 - 12:14:02 PM
Long-term archiving on : Friday, June 28, 2019 - 1:16:40 PM

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  • HAL Id : hal-01719064, version 2

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Susanna Zimmermann. THE REAL PLANE CREMONA GROUP IS A NON-TRIVIAL AMALGAM. 2019. ⟨hal-01719064v2⟩

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