Todor Tsankov

Bureau : Chevaleret 5A46
Téléphone : 01 57 27 91 04

Équipe de Logique Mathématique, IMJ
Université Paris Diderot — Paris 7
UFR de Mathématiques case 7012
75205 Paris cedex 13

todor @ math point jussieu point fr

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• Fifth Young Set Theory Workshop, CIRM Luminy, April 30 – May 4, 2012.
• Continuous Logic and Functional Analysis, Lyon, July 16 – 20, 2012.

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Enseignement

Année 2011–2012

• Théorie descriptive des ensembles et systèmes dynamiques (M2)

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Papers

• Decidability of definability.
  (with M. Bodirsky and M. Pinsker) preprint (2012).
  A preliminary version of this paper appeared in the Proceedings of LICS'11, Toronto.
• Automatic continuity for the unitary group.
  Proc. Amer. Math. Soc., to appear.
• Generic representations of abelian groups and extreme amenability.
  (with J. Melleray) preprint (2011).
• Unitary representations of oligomorphic groups.
  Geom. Funct. Anal., to appear.
• The additive group of the rationals does not have an automatic presentation.
  J. Symbolic Logic 76 (2011), no. 4, pp. 1341–1351.
• Subequivalence relations and positive definite functions.
  (with A. Ioana and A. S. Kechris) Groups Geom. Dyn. 3 (2009), no. 4, pp. 579–625.
• Topological properties of full groups.
  (with J. Kittrell) Ergodic Theory Dynam. Systems 30 (2010), pp. 525–545.
• Modular actions and amenable representations.
  (with I. Epstein) Trans. Amer. Math. Soc. 362 (2010), no. 2, pp. 603–621.
• Amenable actions and almost invariant sets.
  (with A. S. Kechris) Proc. Amer. Math. Soc. 136 (2008), no. 2, pp. 687–697.
• Compactifications of N and Polishable subgroups of S_∞.
  Fund. Math. 189 (2006), no. 3, pp. 269–284.