Stephen Coughlan ; Taro Sano - Smoothing cones over K3 surfaces

epiga:4055 - Épijournal de Géométrie Algébrique, December 21, 2018, Volume 2 - https://doi.org/10.46298/epiga.2018.volume2.4055
Smoothing cones over K3 surfacesArticle

Authors: Stephen Coughlan ORCID1; Taro Sano 2

[en]
We prove that the affine cone over a general primitively polarised K3 surface of genus g is smoothable if and only if g ≤ 10 or g = 12. We also give several examples of singularities with special behaviour, such as surfaces whose affine cone is smoothable even though the projective cone is not.

[fr]
Nous montrons que le cône affine sur une surface K3 primitivement polarisée générale de genre g est lissable si et seulement si g≤ 10 ou g = 12. Nous exhibons également plusieurs exemples de singularités affichant des comportements spécifiques, tels que des surfaces dont le cône affine est lissable alors même que le cône projectif ne l'est pas.


Volume: Volume 2
Published on: December 21, 2018
Accepted on: December 21, 2018
Submitted on: November 7, 2017
Keywords: [MATH.MATH-AG]Mathematics [math]/Algebraic Geometry [math.AG], [en] Deformations, Affine cones, K3 surfaces, Fano 3-folds
Funding:
    Source : OpenAIRE Graph
  • Topological, Algebraic, Differential Methods in Classification and Moduli Theory; Funder: European Commission; Code: 340258

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