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Christoph Sorger

Professor of Mathematics at the université de Nantes


Laboratoire de Mathématiques Jean Leray
Université de Nantes
2, rue de la Houssinière
BP 92208
F - 44322 Nantes Cedex 03

Tél : + 33 251 12 59 21  —  Fax : + 33 251 12 59 12  —  E-Mail:


  • 09/2017 : I am back at the University of Nantes. My successor at Insmi is Pascal Auscher.

  • 12/2014 : I updated the Chow package for SAGE. Installation of the package is easier now.

  • 09/2013 : I am director of the Institut National des Sciences Mathématiques et de leurs interactions (Insmi) since Septembre, 16, 2013 (Press release).

Recent Publications

  • Twisted cubics on cubic fourfolds (avec Ch. Lehn, M. Lehn, and D. van Straten)
    J. Reine Angew. Math. 731 (2017), 87–128.
    We construct a new twenty-dimensional family of projective eight-dimensional holomorphically symplectic manifolds: the compactified moduli space $M_3(Y)$ of twisted cubics on a smooth cubic fourfold $Y$ that does not contain a plane is shown to be smooth and to admit a contraction $M_3(Y)\to Z(Y)$ to a projective eight-dimensional symplectic manifold $Z(Y)$. The construction is based on results on linear determinantal representations of singular cubic surfaces.

  • On symplectic hypersurfaces (avec M. Lehn, Y. Namikawa, D. van Straten)
    277–298, Adv. Stud. Pure Math., 70, Math. Soc. Japan, 2016.