Zobrazeno 1 - 10 of 83 pro vyhledávání: '"Xavier Roulleau"'
1
Akademický článek
An atlas of K3 surfaces with finite automorphism group
Autor: Xavier Roulleau
Publikováno v: Épijournal de Géométrie Algébrique, Vol Volume 6 (2022)
We study the geometry of the K3 surfaces $X$ with a finite number automorphisms and Picard number $\geq 3$. We describe these surfaces classified by Nikulin and Vinberg as double covers of simpler surfaces or embedded in a projective space. We study
Externí odkaz: https://doaj.org/article/761544f10e184bd6ba3ae90c962809d1
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2
Akademický článek
Effect of Litter Treatment on Campylobacter jejuni in Broilers and on Cecal Microbiota
Autor: Amandine Thépault, Xavier Roulleau, Pauline Loiseau, Laurent Cauquil, Typhaine Poezevara, Bertrand Hyronimus, Ségolène Quesne, Florent Souchaud, Alassane Keita, Marianne Chemaly, Muriel Guyard-Nicodème
Publikováno v: Pathogens, Vol 9, Iss 5, p 333 (2020)
Since 2018, when a process hygiene criterion for Campylobacter in broilers at the slaughterhouse was implemented across Europe, efforts to reduce Campylobacter at farm level have increased. Despite numerous studies aiming to reduce Campylobacter colo
Externí odkaz: https://doaj.org/article/4e4f6a983e6b4a7b92183363bfd8f4db
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3
On the geometry of K3 surfaces with finite automorphism group and no elliptic fibrations
Autor: Xavier Roulleau
Publikováno v: International Journal of Mathematics. 33
Nikulin and Vinberg proved that there are only a finite number of lattices of rank $\geq 3$ that are the N\'eron-Severi group of projective K3 surfaces with a finite automorphism group. The aim of this paper is to provide a more geometric description
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c82bdcd928341367cb5b89d91f8bd8a7
https://doi.org/10.1142/s0129167x22500409
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4
The Bolza Curve and Some Orbifold Ball Quotient Surfaces
Autor: Vincent Koziarz, Carlos Rito, Xavier Roulleau
Publikováno v: Michigan Mathematical Journal
Michigan Mathematical Journal, 2021
20 pages, 6 figures, comments welcome; International audience; We study Deraux's non arithmetic orbifold ball quotient surfaces obtained as birational transformations of a quotient $X$ of a particular Abelian surface $A$. Using the fact that $A$ is t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d45618cadc9ceb5151099265b3ee07a0
https://doi.org/10.1307/mmj/1595405184
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5
Effect of Litter Treatment on Campylobacter jejuni in Broilers and on Cecal Microbiota
Autor: Bertrand Hyronimus, Xavier Roulleau, Muriel Guyard-Nicodème, Ségolène Quesne, Florent Souchaud, Typhaine Poezevara, Alassane Keita, Laurent Cauquil, Pauline Loiseau, Amandine Thépault, Marianne Chemaly
Publikováno v: Pathogens, Vol 9, Iss 333, p 333 (2020)
Pathogens
Pathogens, MDPI, 2020, 9 (5), ⟨10.3390/pathogens9050333⟩
Volume 9
Issue 5
Since 2018, when a process hygiene criterion for Campylobacter in broilers at the slaughterhouse was implemented across Europe, efforts to reduce Campylobacter at farm level have increased. Despite numerous studies aiming to reduce Campylobacter colo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dad38b9cb9b524d69e311d5ac0a08990
https://www.mdpi.com/2076-0817/9/5/333
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6
Construction of Nikulin configurations on some Kummer surfaces and applications
Autor: Alessandra Sarti, Xavier Roulleau
Publikováno v: Mathematische Annalen
Mathematische Annalen, Springer Verlag, 2019, 373 (1-2), pp.597-623. ⟨10.1007/s00208-018-1717-5⟩
Mathematische Annalen, 2019, 373 (1-2), pp.597-623. ⟨10.1007/s00208-018-1717-5⟩
A Nikulin configuration is the data of $16$ disjoint smooth rational curves on a K3 surface. According to a well known result of Nikulin, if a K3 surface contains a Nikulin configuration $\mathcal{C}$, then $X$ is a Kummer surface $X=Km(B)$ where $B$
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7b0e1ff30b1eb492cd4d1648fc896b6
https://doi.org/10.1007/s00208-018-1717-5
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7
A Pair of Rigid Surfaces with pg= q = 2 and K2= 8 Whose Universal Cover is Not the Bidisk
Autor: Xavier Roulleau, Francesco Polizzi, Carlos Rito
Publikováno v: International Mathematics Research Notices
International Mathematics Research Notices, Oxford University Press (OUP), 2018, ⟨10.1093/imrn/rny107⟩
We construct two complex-conjugated rigid surfaces with $p_g=q=2$ and $K^2=8$ whose universal cover is not biholomorphic to the bidisk. We show that these are the unique surfaces with these invariants and Albanese map of degree $2$, apart the family
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54953f0cbb4f554a0bff219755a7d57f
https://doi.org/10.1093/imrn/rny107
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8
Conic configurations via dual of quartic curves
Autor: Xavier Roulleau
Publikováno v: Rocky Mountain J. Math.
Rocky Mountain J. Math., 2021
Rocky Mountain Journal of Mathematics
We construct special conics configurations from some points configurations which are the singularities of the dual of a quartic curve.
Comment: 13 pages, few corrections
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eeb1c40b876c8e77456614a11c45fe03
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9
An atlas of K3 surfaces with finite automorphism group
Autor: Xavier Roulleau
Publikováno v: Épijournal de Géométrie Algébrique
Épijournal de Géométrie Algébrique, 2022
We study the geometry of the K3 surfaces $X$ with a finite number automorphisms and Picard number $\geq 3$. We describe these surfaces classified by Nikulin and Vinberg as double covers of simpler surfaces or embedded in a projective space. We study
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acb13f70d80084f21f669e28d4f78b7c
https://hal.archives-ouvertes.fr/hal-02537218
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