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Geometry


Organizers: S. Moroianu, L. Ornea

Time and place:Tuesdays 10:00-11:30, room 306-307 (Sala "Constantin Bănică"), IMAR

Current talks:

  • June 4, 2019. Costin Vîlcu, IMAR
    Puncte critice pentru funcții distanță II

  • June 25, 2019. Călin Iuliu Lăzăroiu, IFIN-HH & IBS-CGP
    Hesse manifolds and Hesse functions
    Abstract: I study Hesse manifolds, defined as those Riemannian manifolds which admit non-trivial functions (called Hesse functions) whose Hessian tenspr is proportional to the function through the Riemannian metric. I show that a Riemannian manifold is locally maximally Hesse (i.e. admits a maximally dimensional space of local solutions to the Hesse equation) iff it is real analytic, in which case the manifold is hyperbolic. Moreover, I classify those complete globally Hesse manifolds which are locally maximally Hesse, showing that they coincide with the elementary hyperbolic space forms. I also propose a few problems for further research. Hesse manifolds and Hesse functions appear in the study of Noether symmetries of certain cosmological models containing scalar fields.

  • July 16, 2019. Adrien Boulanger, Marseille
    Moduli spaces of dilatation surfaces

  • September 24, 2019. Paul-Andi Nagy, University of Murcia / Universitatea București
    Toric nearly Kähler manifolds

  • October 22, 2019. Sergiu Moroianu, IMAR
    Teorema Gauß-Bonnet generalizată

  • October 29, 2019. Florin Belgun, IMAR
    Forma Thom pe un fibrat real orientat

  • November 5, 2019. Liana David, IMAR
    Operatorul de generare Dirac al unui algebroid Courant

  • November 12, 2019. Dan Burghelea, Ohio State University
    De la topologie la geometrie via continuare analitică

  • November 19, 2019. Ovidiu Preda / Miron Stanciu , IMAR
    t.b.a.

Click on the title for the abstract (if available)

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