Geodesic
Algebraic models of the Euclidean plane
Épijournal de Géométrie Algébrique, Tome 2 (2018)

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We introduce a new invariant, the real (logarithmic)-Kodaira dimension, that allows to distinguish smooth real algebraic surfaces up to birational diffeomorphism. As an application, we construct infinite families of smooth rational real algebraic surfaces with trivial homology groups, whose real loci are diffeomorphic to $\mathbb{R}^2$, but which are pairwise not birationally diffeomorphic. There are thus infinitely many non-trivial models of the euclidean plane, contrary to the compact case. 
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     author = {Blanc, J\'er\'emy and Dubouloz, Adrien},
     title = {Algebraic models of the {Euclidean} plane},
     journal = {\'Epijournal de G\'eom\'etrie Alg\'ebrique},
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     year = {2018},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/epiga.2018.volume2.4511/}
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Blanc, Jérémy; Dubouloz, Adrien. Algebraic models of the Euclidean plane. Épijournal de Géométrie Algébrique, Tome 2 (2018). doi: 10.46298/epiga.2018.volume2.4511

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